A motor control method includes driving a motor in a forward rotational direction at a rotational speed corresponding to a duty cycle range of a first control signal that is a pulse width modulation signal, and when the rotational direction and the rotational speed of the motor correspond to that when the motor is not rotating and a second control signal that is a pulse width modulation signal having a frequency different from a frequency of the first control signal is received, driving the motor in a reverse rotational direction. Thus, the method controls the motor by switching the rotational direction of the motor between the forward rotational direction and the reverse rotational direction with a high degree of freedom to reduce or prevent malfunctioning.
H02P 27/08 - Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using DC to AC converters or inverters with pulse width modulation
2.
TEMPERATURE DETECTION DEVICE, COIL, TRANSFORMER, AND TEMPERATURE DETECTION METHOD
A temperature detection device according to one aspect of the present disclosure comprises a twisted wire and a detector. The twisted wire is formed of one conductor. The twisted wire is provided so as to be in contact with the conductive wire of the coil. The detector detects the temperature of the conductive wire on the basis of the resistance value of the twisted wire.
An inverter unit electrically connected to a stator and a bus bar unit electrically connecting the stator and the inverter unit are included. The bus bar unit includes a temperature detection unit that detects a temperature of a bus bar, and a holding portion that holds the bus bar and the temperature detection unit. A connection portion protruding from the holding portion of the temperature detection unit and electrically connected to the inverter unit radially overlaps the bus bar connection portion protruding from the holding portion of the bus bar and electrically connected to the inverter unit.
An exemplary refrigerant circulation device according to the present disclosure comprises a housing, a radiator, a pump, and an airflow generation unit. The housing has an opening. The radiator is positioned so as to be spaced apart from the opening. The pump is connected to a refrigerant flow-path of the radiator, and pumps the refrigerant. The airflow generation unit generates an airflow that passes through the opening and contacts the flow-path. The pump is located between the opening and the radiator. The distance between the opening and the pump is shorter than the distance between the pump and the radiator.
F28D 1/02 - Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with the heat-exchange conduits immersed in the body of fluid
F04B 41/00 - Pumping installations or systems specially adapted for elastic fluids
H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating
A spindle motor includes a shaft, a base part, a stator core, a rotor, and a bearing part. The shaft extends along a center axis extending in the vertical direction. The bearing part includes an upper annular member, a lower annular member, and a sleeve. The upper annular member and the lower annular member protrude radially outward from an outer peripheral surface of the shaft and are disposed to be spaced apart from each other in the axial direction. The sleeve covers the outer peripheral surface of the shaft, extends in the axial direction, and is defined in a cylindrical shape. The base part has an annular protruding portion that protrudes axially upward from the upper surface of the base part and surrounds the shaft. The stator core is held on an outer peripheral surface of the annular protruding portion.
H02K 5/167 - Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using sliding-contact or spherical cap bearings
H02K 5/24 - CasingsEnclosuresSupports specially adapted for suppression or reduction of noise or vibrations
A rotary electric machine according to one embodiment of the present invention comprises: a stator core having a teeth section; an insulator that surrounds the teeth section around an axial line extending in a first direction and passing through the teeth section, and that is elongated in a second direction orthogonal to the first direction as viewed in the first direction; and a coil part that is formed of an elastic coil wire and is wound around the insulator. The insulator has a first insulator part, a second insulator part opposite the first insulator part in the second direction, and protrusion parts protruding in the second direction. The protrusion parts include a first protrusion part that protrudes from one of the first and second insulator parts toward the other of the first and second insulator parts. The first protrusion part is deformable.
A stator includes a core back, teeth, and a coil. The core back has an annular shape surrounding the central axis in a circumferential direction. The teeth extend radially outward from the core back, and are arranged in the circumferential direction. The coil is wound around each of the teeth. In the coil, a current of any phase of three-phase alternating current flows. At least a portion of an extending line connecting a first coil wound around a first tooth among the teeth and a second coil through which a current having the same phase as that of the first coil flows is located in a slot between any two of the teeth except the first tooth and a second tooth located adjacent to the first tooth. The extending line is at a root of any of the two teeth in the slot.
A motor includes a coupling portion in which common wires of a plurality of coil groups are electrically connected and coupled, the coupling portion extends from a radial inside to a radial outside or vice versa in a slot that is a portion between teeth adjacent to each other in a circumferential direction, and the motor includes a sealing portion that seals at least the coupling portion.
H02K 3/44 - Protection against moisture or chemical attackWindings specially adapted for operation in liquid or gas
H02K 3/52 - Fastening salient pole windings or connections thereto
H02K 11/33 - Drive circuits, e.g. power electronics
H02K 15/122 - Impregnating, moulding insulation, heating or drying of windings, stators, rotors or machines of windings
H02K 15/32 - Manufacture of terminal arrangementsConnecting the terminals to external circuits
H02K 21/22 - Synchronous motors having permanent magnetsSynchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating around the armatures, e.g. flywheel magnetos
A lead wire of a coil group of a motor penetrates a through hole of a circuit board, an exposed portion of the lead wire is electrically connected to a wiring pattern, and a cover seals the exposed portion of the lead wire.
H02K 3/52 - Fastening salient pole windings or connections thereto
H02K 11/33 - Drive circuits, e.g. power electronics
H02K 15/32 - Manufacture of terminal arrangementsConnecting the terminals to external circuits
H02K 21/22 - Synchronous motors having permanent magnetsSynchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating around the armatures, e.g. flywheel magnetos
A refrigerant circulation device includes a common flow path, first and second flow paths branching from the common flow path, a third flow path, a heat exchanger through which the first and third flow paths extend and in which heat is exchanged, a first valve to adjust the flow rate of the first flow path, a second valve to adjust the flow rate of the second flow path, a sensor to detect a temperature of a refrigerant, a device temperature that is a temperature in the device, and a relative humidity in the device, and a changing assembly to change first and second opening degrees of the first and second valve such that a sum of the first and second opening degrees becomes a predetermined value, based on the temperature, the device temperature, and the relative humidity.
A flow path structure includes a flow path tube, a connection portion, and a clamp portion. The flow path tube includes a flow path tube space. The connection portion internally includes a connection portion space, and at least a portion of the connection portion is located in the flow path tube space. The clamp portion is located on an outer peripheral surface of the flow path tube. The thermal expansion coefficient of the flow path tube is different from that of the connection portion. The clamp portion includes a band portion surrounding the outer peripheral surface of the flow path tube at a position where the flow path tube and the connection portion overlap each other, and an acting portion that changes the size of an inner diameter of the band portion.
F16L 33/207 - Undivided rings, sleeves, or like members contracted on the hose or expanded inside the hose by means of toolsArrangements using such members only a sleeve being contracted on the hose
H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating
This impeller for a fan device comprises a hub, a plurality of blades, and a connection part. The hub has a lidded tube shape that extends in the axial direction. One end of the hub in the axial direction is open. The plurality of blades extend radially outward from a radially outward side surface of the hub and are arranged along the circumferential direction. The connection part is disposed between radially outward ends of at least some blades which are adjacent in the circumferential direction, extends in the circumferential direction, and connects the radially outer radially outward ends of said blades. As seen from the axial direction, the connection part spreads out radially. This impeller suppresses the occurrence of noise when the blades rotate.
A motor includes a stator, a rotor, a stator holder with electrical conductivity that holds the stator, a circuit board, and a fastening screw. The fastening screw with electrical conductivity includes a head portion and a screw body, and holds the circuit board clamped between the head portion and the stator holder in a state where the screw body is screwed to the stator holder while being in contact with both a frame ground portion of the circuit board and the stator holder.
H02K 11/01 - Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for shielding from electromagnetic fields
H02K 1/18 - Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
15.
STATOR, MOTOR, AND METHOD FOR MANUFACTURING STATOR
One embodiment of a stator according to the present invention is a stator that faces a rotor that can rotate around a central axis line in the axial direction, the stator being provided with: a plurality of teeth arranged in the circumferential direction; coils respectively attached to the plurality of teeth; and a first resin part for holding the plurality of teeth. The first resin part has an insulator part positioned between the teeth and the coils.
H02K 1/18 - Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
H02K 3/34 - Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation
A rotor according to an aspect of the present invention includes a shaft including: a first shaft hole extending in an axial direction; and a second shaft hole extending radially outward from the first shaft hole and opening to an outer peripheral surface of the shaft. A rotor core includes a plurality of core holes extending in the axial direction and disposed at intervals in a circumferential direction. A plate includes a through-hole overlapping the core hole when viewed in the axial direction, and a flow path connecting the second shaft hole and the through-hole. The plate has an outer edge away from a central axis by a second distance that is shorter than a first distance from the central axis to an outer edge of the rotor core.
A coupling device includes a first portion and a coupling portion. The first portion includes a first flow path and an attachment portion. The coupling portion includes a first tubular portion including one end portion to be connected to a second tubular portion of a second portion including a second flow path, and an arrangement portion provided at the other end portion of the first tubular portion and to be attached to the attachment portion. The movement of the arrangement portion with respect to the first portion is suppressed in the axial direction of the first tubular portion. The arrangement portion is movable with respect to the first portion in the radial direction of the first tubular portion. A maximum outer diameter of the arrangement portion is smaller than a maximum outer diameter of the first tubular portion.
F16L 27/08 - Adjustable jointsJoints allowing movement allowing adjustment or movement only about the axis of one pipe
F16L 29/04 - Joints with fluid cut-off means with a cut-off device in each of the two pipe ends, the cut-off devices being automatically opened when the coupling is applied
18.
HEAT DISSIPATION MEMBER, COOLING DEVICE, AND SEMICONDUCTOR MODULE
A heat dissipation member to be installed in a liquid cooling jacket includes a base extending in a first direction of a refrigerant flow and a second direction, and having a thickness in a third direction, one or more fin groups arranged side by side in the first direction, the fin group including fins projecting from the base to one side in the third direction and arranged in the second direction, and a top plate at an end on one side in the third direction of the fin. A gap in the third direction is between the top plate and a top surface of the liquid cooling jacket. The top plate has first recessed portions recessed from a surface on one side in the third direction of the top plate to another side in the third direction and arranged side by side in the first direction.
H01L 23/473 - Arrangements for cooling, heating, ventilating or temperature compensation involving the transfer of heat by flowing fluids by flowing liquids
A motor includes a rotor rotatable about a central axis extending in an axial direction, a bearing to rotatably support the rotor radially inside, a bearing accommodating portion to accommodate the bearing radially inside, and an annular portion located over at least a portion of the entire region in a circumferential direction. The bearing includes a first groove that is recessed radially inward on an outer peripheral surface and is located over at least a portion of the entire region in the circumferential direction. The bearing accommodating portion includes a second groove that is recessed radially outward on the inner peripheral surface and located over at least a portion of the entire region in the circumferential direction. A portion of the annular portion is accommodated in the first groove. Another portion of the annular portion is accommodated in the second groove.
In the present invention, taking the downstream side of this liquid cooling jacket as one side in a first direction and the upstream side as the other side in the first direction, when the number of protrusions l is even, the numbers n = 1 to m (where m = l/2) are assigned to the protrusions in order, respectively, from the furthest other side in the first direction toward the one side in the first direction, and from the furthest one side in the first direction toward the other side in the first direction, and when the number of protrusions l is odd, the numbers n = 1 to m (where m = (l+1)/2) are assigned to the protrusions in order, respectively, from the furthest other side in the first direction toward the one side in the first direction, and from the furthest one side in the first direction toward the other side in the first direction, and the gap in a third direction between the protrusions and a heat dissipation member decreases progressively for protrusions assigned with greater numbers.
H01L 23/473 - Arrangements for cooling, heating, ventilating or temperature compensation involving the transfer of heat by flowing fluids by flowing liquids
F28F 1/40 - Tubular elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only inside the tubular element
H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating
This connection member has: a first component in which a first flow path for a fluid is formed; a second component which is connected to the first component and in which a second flow path connected to the first flow path is formed; and a first sealing member and a second sealing member that create a seal between the first component and the second component. The connection member also has a cylinder part extending along a first direction in which the first flow path extends. The cylindrical part has a first surface positioned on the outer side of the cylindrical part in the radial direction, and a second surface extending in a second direction intersecting the first direction. The second component has a third surface facing the first surface and a fourth surface facing the second surface. The first sealing member and the second sealing member are annular members and are disposed on the outer periphery of the first flow path or the second flow path. The first sealing member is disposed between the first surface and the third surface. The second sealing member is disposed between the second surface and the fourth surface.
A communication method according to one aspect of the present invention is executed by each of a plurality of communication devices sharing a communication bus, the method comprising: a first step for acquiring a random number; a second step for generating a first standby time and the address of the own device on the basis of the random number; a third step for starting measurement of time; a fourth step for determining the own device as a master when the time has reached the first standby time without receiving access from another communication device; a fifth step for accessing the other communication device immediately after determining the own device as the master; and a sixth step for determining the own device as a slave when access from the other communication device has been received before the time reaches the first standby time.
This motor comprises a rotor, a stator located on the radially outer side of the rotor, and a bus bar assembly positioned on one side of the stator in the axial direction. The insulator of the stator has an inner side insulator portion positioned radially inward of a coil. The bus bar assembly has a bus bar and a bus bar holder that holds the bus bar. The bus bar holder has an annular holder body portion surrounding the central axis. The bus bar has a coil connection portion connected to a coil lead-out line led out from the coil. The coil connection portion protrudes radially outward from the holder body portion. One of the inner side insulator portion and the bus bar holder has a first recess. The other of the inner side insulator portion and the bus bar holder has a first protrusion. At least a part of the first protrusion is inserted into the first recess. The bus bar holder is supported by the inner side insulator portion in the axial direction.
A refrigerant circulation device includes a primary flow path, a secondary flow path, a valve, and a controller. The primary flow path allows circulation of a primary refrigerant. The secondary flow path allows circulation of a secondary refrigerant. The valve is provided in the primary flow path or the secondary flow path, and includes an opening degree that is adjustable. The controller is configured or programmed to control operation of the valve and cause the valve to perform a predetermined operation when a period during which the valve is not operated exceeds a threshold value.
This inverter device comprises: a housing; a switching element that is attached to an inner surface of the housing; a capacitor that is attached to the inner surface alongside the switching element in a first direction, and that is connected to the switching element; a first bus bar that extends along the first direction to connect the switching element and the capacitor; a second bus bar that is positioned on a side opposite the inner surface with the first bus bar therebetween, and that extends along the first direction to connect the switching element and the capacitor; a first welding trace that extends on the first bus bar in a second direction intersecting the first direction; and a plurality of second welding traces that extend on the second bus bar in the second direction, and that are positioned on both sides sandwiching the first welding trace when viewed in a normal direction of the inner surface.
H02M 7/48 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
H01G 13/00 - Apparatus specially adapted for manufacturing capacitorsProcesses specially adapted for manufacturing capacitors not provided for in groups
A heat dissipation member includes a plate-shaped base portion that extends in a first direction along a direction in which a refrigerant flows and in a second direction orthogonal to the first direction and has thickness in a third direction orthogonal to the first direction and the second direction, and a fin projecting from the base portion toward one side in the third direction. The fin includes a flat plate-shaped side wall portion that extends in the first direction and the third direction, and has a thickness direction in the second direction. The side wall portion has a slit penetrating in the second direction. The number of the slits for each of regions defined by the same length in the first direction increases toward one side in the first direction which is the downstream side.
A power conversion device includes a first three-phase full-bridge circuit connected to one end of a three-phase coil of an open-winding three-phase motor, a second three-phase full-bridge circuit connected to another end of the three-phase coil, and a control unit that individually controls voltage application time of the three-phase coil. The control unit minimizes a width of a first time region in which voltage application time of an X-phase coil and voltage application time of a Y-phase coil overlap within one control period of the pulse width modulation, and changes a position of a second time region occupied by voltage application time of the Z-phase coil within the one control period, based on target voltage application time length of each of the X-phase coil, the Y-phase coil, and the Z-phase coil with a smallest current value among the three-phase coils and a current direction of the Z-phase coil.
H02M 7/5395 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters with automatic control of output wave form or frequency by pulse-width modulation
H02M 1/14 - Arrangements for reducing ripples from DC input or output
H02M 7/5387 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
A rotor is provided in a rotary electric machine, is opposed to a stator, and rotatable about a central axis. The rotor includes magnetic pole portions arranged along a circumferential direction about the central axis, and a rotor core that supports the magnetic pole portions from a radial side. The magnetic pole portions include a main magnet in which a radial direction is a magnetization direction, and sub magnets arranged symmetrically with each other on a circumferential outside of the main magnet, sub magnets in which a direction inclined circumferentially with respect to a radial direction being a magnetization direction. The rotor core includes a recess portion that accommodates a main magnet supported portion facing radially inward of the main magnet and is recessed radially inward.
A cooling device includes a liquid cooling jacket and a heat dissipation member. The heat dissipation member includes a base extending in a first direction of a refrigerant flow and in a second direction, with a thickness in a third direction, a fin projecting from the base to one side in the third direction, and a top plate at an end of the fin. The jacket includes a first flow path extending in the first direction, and a second flow path connected to and extending from the downstream side of the first path to one side in the third direction. In the third direction, a surface connecting the first and second paths overlaps the top plate. A heating element is on the most downstream side on another side in the third direction of the base from where the second path starts to extend to one side in the third direction.
H01L 23/367 - Cooling facilitated by shape of device
H01L 23/473 - Arrangements for cooling, heating, ventilating or temperature compensation involving the transfer of heat by flowing fluids by flowing liquids
This impeller in a fan device includes a hub and a plurality of rotor blades. The hub assumes the shape of a bottomed cylinder extending in the axial direction. One end of the hub in the axial direction is open. The plurality of rotor blades are disposed further radially outward than the hub and are arranged along the circumferential direction. Each of the rotor blades has a blade part and a holding part. The blade part expands in the axial direction and the radial direction and inclines in one circumferential direction toward the other side in the axial direction. The holding part extends radially inward from one end of the blade part in the axial direction and is connected to the hub.
A vibrating motor includes a stationary portion, a movable element having a magnet member and capable of vibrating in a first direction, and an elastic member. The stationary portion has a coil that applies a driving force to the magnet member when the coil is energized, and a case that accommodates the movable element and the coil therein. The movable element has a holder member that holds one end portion in the first direction of the magnet member. The elastic member is connected to the holder member. The case has a case notch. The case notch is notched toward the other side in the first direction from one end in the first direction of the case. The holder member has a holder notch that is notched toward one side in a second direction perpendicular to the first direction. The case notch and the holder notch overlap as viewed in the second direction.
H02K 33/18 - Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with coil systems moving upon intermittent or reversed energisation thereof by interaction with a fixed field system, e.g. permanent magnets
B06B 1/04 - Processes or apparatus for generating mechanical vibrations of infrasonic, sonic or ultrasonic frequency making use of electrical energy operating with electromagnetism
H02K 33/02 - Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with armatures moved one way by energisation of a single coil system and returned by mechanical force, e.g. by springs
32.
ROTOR, ROTOR MANUFACTURING APPARATUS, AND ROTOR MANUFACTURING METHOD
A rotor includes a columnar rotor core extending in the axial direction, and a rotor cover covering a radially outer side of the rotor core. The rotor cover includes a protruding portion protruding to one side in the axial direction with respect to a one-side end surface in the axial direction of the rotor core, and a flange portion extending radially outward at a one-side end portion in the axial direction of the protruding portion.
H02K 15/035 - Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies having permanent magnets on the rotor
H02K 15/121 - Impregnating, moulding insulation, heating or drying of windings, stators, rotors or machines of cores
The present invention comprises: a capacitor module having a capacitor element and a case part for accommodating the capacitor element; a power module having a power semiconductor element for performing power conversion; a control board for driving the power module; and a bus bar module having a bus bar. The capacitor element has a capacitor body part and a first connection terminal extending from the capacitor body part to one side in a first direction. The power module has a second connection terminal. The bus bar electrically connects the first connection terminal and the second connection terminal. The case part has: a first housing part which is recessed from one side in the first direction to the other side in the first direction and accommodates the capacitor body part; and a first flow path through which a refrigerant flows.
H02M 7/48 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
A rotor of one embodiment of the present invention is able to rotate about the central axis, and comprises: a rotor core; and an end plate that has a first plate surface facing the rotor core in the axial direction, and a second plate surface facing the inverse side from the first plate surface. The first plate surface comprises a contact surface that makes contact with the rotor core in the axial direction in a state where at least a portion of the end plate is elastically deformed in the axial direction. The contact surface comprises a first surface. In a state where the end plate is not elastically deformed, the first surface is, toward the radially outward side, located increasingly close to a first side of the axial direction where the rotor core is arranged with respect to the end plate. In the state where the end plate is not elastically deformed, a radially outward end of the first surface is a portion of the contact surface that is located closest to the first side. The end plate has a first recess provided to an outer surface of the end plate. At least a portion of the first recess overlaps the first surface in the axial direction.
According to one embodiment of this rotor, the rotor is for a rotating electric machine rotating around a central axis, and the rotor comprises: a rotor core in which are provided a plurality of slots that are arranged side by side in a circumferential direction and penetrate in an axial direction; a plurality of conductor sections disposed in the slots; a pair of end rings that are located respectively on one axial-direction side and the other axial-direction side of the rotor core and link the plurality of conductor sections; and a pair of plate members that are located between the end rings and an end surface on the one axial-direction side of the rotor core and an end surface on the other axial-direction side of the rotor core, respectively. Either the plate members or the end rings have protruding sections that project in the axial direction. The other of the plate members and the end rings have accommodation sections that accommodate the protruding sections. The protruding sections and the accommodation sections extend in the circumferential direction.
[PROBLEM] To provide a technology capable of improving a cooling effect. [SOLUTION] A rotating electric machine according to one aspect of the present disclosure includes: an annular stator yoke; a plurality of teeth; a coil; and a cooler. The plurality of teeth protrude radially inward or radially outward from the stator yoke. The coil is wound around the teeth. The cooler extends along the axial direction of the stator yoke between adjacent coils and contacts the coils.
H02K 3/24 - Windings characterised by the conductor shape, form or construction, e.g. with bar conductors with channels or ducts for cooling medium between the conductors
H02K 9/19 - Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
A rotor is a rotor rotatable about a central axis, and includes a rotor core and a plurality of flux barrier groups provided in the rotor core and arranged at intervals in a circumferential direction. Each of a plurality of the flux barrier groups includes a plurality of flux barriers arranged side by side at intervals in a radial direction, the rotor core has a projecting portion projecting from an edge portion of the flux barrier toward the inside of the flux barrier, and in each of a plurality of the flux barrier groups, an edge portion of at least one of the flux barriers is provided with two or more of the projecting portions.
One aspect of a signal generation device of the present invention includes N sensors that output N phase signals (N is a multiple of three) according to a rotation angle of a rotating body, and a signal processing unit that processes the N phase signal. The signal processing unit executes first processing of calculating a first N phase complex vector based on the N phase signals, second processing of transforming the first N phase complex vector into a first positive phase vector, third processing of calculating a second positive phase vector by normalizing, with a norm of the first positive phase vector, a real axis component and an imaginary axis component of the first positive phase vector obtained in the second processing, and fourth processing of inversely transforming the second positive phase vector obtained in the third processing into a second N phase complex vector.
G01D 5/14 - Mechanical means for transferring the output of a sensing memberMeans for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for convertingTransducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
In a cooling device, a main body is capable of being in thermal contact with a heat source and includes a flow path for refrigerant. A protruding portion protrudes from one surface of the main body to one side in a predetermined direction, and includes a hole extending from an end portion on the one side in the predetermined direction to the flow path. A joint is inserted into the hole, and includes a flow path connected to the flow path of the main body. A restricting portion restricts movement of the joint. A leak sensor is mounted on a substrate, and is capable of detecting liquid leakage. The substrate includes a first portion that is positioned on the one surface and around the protruding portion. The restricting portion includes a second portion protruding from the end portion of the protruding portion in an intersecting direction.
One aspect of a power conversion device of the present invention includes a power conversion circuit that performs mutual conversion between DC power and N-phase AC power (N is an integer of three or more), and a control unit having a first deformation mode for controlling the power conversion circuit by pulse width modulation based on an N-phase modulated waveform and a carrier waveform. In the first deformation mode, the control unit outputs the N-phase modulated waveform obtained by adding a first offset waveform W1(θ) expressed by Formula having, as variables, a sign Sgn (Sgn is 1 or −1), a first change rate K1, and a maximum value fmax(θ) and a minimum value fmin(θ) of an N-phase AC waveform at an electrical angle θ and the N-phase AC waveform, and the first change rate K1 of the first deformation mode is larger than 0 and smaller than 1.
H02P 27/08 - Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using DC to AC converters or inverters with pulse width modulation
41.
REFRIGERANT CIRCULATION DEVICE, COOLING DEVICE, AND PUMP UNIT
A refrigerant circulation device includes a primary flow path, a secondary flow path, a heat exchanger, a housing, a power connector, two inflow ports, and two outflow ports. The primary refrigerant flows through the primary flow path. The secondary refrigerant flows through the secondary flow path. The heat exchanger is connected to the primary and secondary flow paths. The housing includes two first outer side surfaces extending along a first direction in a plan view and two second outer side surfaces extending along a second direction intersecting the first direction, the housing accommodating the primary flow path, the secondary flow path, and the heat exchanger. The power connector is provided on and protrudes from the first outer side surface. The two inflow ports are positioned on the first outer side surface provided with the power connector and communicate with the primary flow path and the secondary flow path, respectively.
A motor according to an aspect of the present invention is a motor capable of switching the number of poles, and comprises: a rotor that can rotate about a central axis; and a stator that is positioned on the outer side of the rotor in the radial direction. The stator has a stator core facing the rotor with a gap therebetween in the radial direction, and a plurality of coil parts. The stator core has an annular core back part, and a plurality of tooth parts that protrude radially inward from the inner circumferential surface of the core back part, and are arranged along the inner circumferential surface of the core back part. The plurality of coil parts are attached to the plurality of tooth parts. The ratio of a radial dimension of the core back part to the minimum dimension of each of the tooth parts in a direction orthogonal to the radial direction is 142-352%.
A rotor includes a columnar rotor core extending in the axial direction, a rotor cover covering a radially outer side of the rotor core, and a resin portion covering a one-side end surface in the axial direction of the rotor core. The rotor cover includes a protruding portion protruding to one side in the axial direction with respect to the one-side end surface in the axial direction of the rotor core. The resin portion includes, on the radially outer side, an edge portion that protrudes to one side in the axial direction and is in contact with the radially inner side of the protruding portion.
A motor includes a rotor rotatable in a circumferential direction around a center axis extending vertically, a stator to rotate the rotor, a lead wire connected to the stator, and a housing covering the rotor and the stator from a radially outer side. The housing includes a first housing located on a first side in an axial direction, and a second housing located on a second side in the axial direction. The first housing includes a wiring convex portion protruding toward the second side in the axial direction. The second housing includes a wiring recess that is recessed toward the second side in the axial direction and penetrates in a radial direction. The wiring convex portion is located in the wiring recess. The wiring convex portion includes a tip surface opposing the second side. The wiring recess includes a bottom surface opposing the first side.
Provided is a lens unit comprising a plurality of lenses and a cylindrical accommodating member that accommodates the plurality of lenses therein, the accommodating member having a crimping part, and an outermost lens positioned on an opening side of the accommodating member from among the plurality of lenses being fixed by the crimping part, wherein the outermost lens has a crimped part that comes into contact with the crimping part, the outermost lens is provided with an antireflection film on at least the object-side surface of the outermost lens, and the expression Xc > Xar is satisfied, where Xar is the position of the outer periphery of the antireflection film in the radial direction with the optical axis of the outermost lens as the origin point, and Xc is the position of the crimped part of the outermost lens.
G03B 30/00 - Camera modules comprising integrated lens units and imaging units, specially adapted for being embedded in other devices, e.g. mobile phones or vehicles
A rotor manufacturing method includes: a punching step of punching a steel sheet to form a laminated steel sheet having a core plate, a plurality of piece plates, and a plurality of connecting portions each connecting each of the plurality of piece plates and the core plate in a radial direction; a laminating step of laminating the laminated steel sheets in the thickness direction to form a laminated body; and a connecting portion removing step of removing the plurality of connecting portions from the laminated body to form magnet arrangement spaces for arranging magnets between the core plate and the plurality of piece plates.
H02K 15/03 - Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies having permanent magnets
A blower includes an impeller and a housing. The impeller is rotatable about a central axis. The housing accommodates the impeller. The housing includes a cylindrical wall portion extending along the central axis and covers the impeller from radially outside and including groove portions recessed in a radial direction from an inner circumferential surface of the cylindrical wall portion and arranged in a circumferential direction. A circumferential width of each of the groove portions decreases from an end portion on an upstream side in an air blowing direction of the impeller toward an end portion on a downstream side in the air blowing direction.
This pump comprises: a rotor that can rotate about a central axis; a stator that is positioned radially outward of the rotor and that surrounds the rotor; a pump unit that is connected to one side in the axial direction of the rotor; an accommodation member that accommodates the rotor therein; and a bus bar assembly that includes a bus bar which is electrically connected to a coil provided to the stator, and a bus bar holder which holds the bus bar. The accommodation member includes: a lid part that covers the rotor from the other side in the axial direction; a cylindrical part that is positioned between the rotor and the stator in the radial direction, and that opens to the one side in the axial direction; and a bottom part that spreads radially outward from the cylindrical part, and that covers the stator from the one side in the axial direction. The stator has a stator core positioned radially outward of the cylindrical part. The bus bar assembly has a ground connection member held by the bus bar holder, and is positioned on the other side in the axial direction of the lid part. The ground connection member contacts a stator core.
This pump comprises a rotor, a stator that is positioned radially outward of the rotor and surrounds the rotor, a pump unit that is connected to one side of the rotor in the axial direction, an accommodation member that accommodates the rotor therein, and a fixed shaft that extends in the axial direction and supports the rotor in a rotatable manner. The accommodation member has a lid portion that covers the rotor from the other side in the axial direction, a first cylindrical portion that is positioned between the rotor and the stator in the radial direction and is open toward the one side in the axial direction, and a bottom portion that spreads radially outward from the first cylindrical portion and covers the stator from the one side in the axial direction. The lid portion holds an end portion of the fixed shaft on the other side in the axial direction. The stator has a stator core that is positioned radially outward of the first cylindrical portion. The stator core has an annular core back that surrounds the first cylindrical portion, and a plurality of teeth that extend radially inward from the core back and are provided at intervals in the circumferential direction. First ribs extending in the axial direction are provided to the radially outward surface of the first cylindrical portion. The first ribs are in contact with the radially inward surfaces of the teeth.
A motor includes a rotor rotatable about a central axis extending in an axial direction, a stator including coil assemblies arranged in a circumferential direction, and a bus bar assembly including a bus bar to electrically connect end portions of the coil assemblies to each other. A rotor recessed portion recessed in the axial direction is defined in the rotor, and at least a portion of the bus bar is accommodated in the rotor recessed portion.
A motor with a motor body includes a rotor rotatable about a center axis extending in an axial direction and a stator opposing the rotor with a gap interposed therebetween, a housing accommodating the motor body, a cover covering the housing from a first side in the axial direction, a controller including an electronic component and accommodated between the housing and the cover, and a weight fixed to the cover.
One embodiment of a stator according to the present invention comprises a stator core and a winding part. The winding part has a plurality of conductor linking bodies. The conductor linking bodies that are of the same phase each include 2N first conductor linking bodies and 2N second conductor linking bodies, where N is a natural number. The conductor linking bodies are passed through a plurality of slots, wound in a plurality of turns in the circumferential direction from an input end to an output end, and transition to a layer on the inside in the radial direction every one turn. The input ends of the same phase are connected to each other, and the output ends of the same phase are connected to each other. The plurality of conductor linking bodies of the same phase are respectively passed through a plurality of slots arranged side by side in the circumferential direction, intersect each other and are interchanged in the arrangement thereof in the circumferential direction every one turn, and are passed through the slots.
A method of manufacturing a stator includes a pressing step of punching an iron core piece forming part from a steel sheet by press molding, a mounting step of mounting insulating paper on each of a plurality of protruding portions arranged in a circumferential direction on an outer peripheral surface of a columnar roll member rotating about a central axis and extending along the central axis, and a stacking step of spirally winding the iron core piece forming part around the outer peripheral surface of the roll member while deforming it in one direction in a width direction by rotating the roll member in a state where the protruding portion and the insulating paper are inserted into a slot, and stacking the iron core piece forming part in a thickness direction.
H02K 15/02 - Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
H02K 3/34 - Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation
H02K 15/10 - Applying solid insulation to windings, stators or rotors, e.g. applying insulating tapes
This blower device has a fan part and a housing part. The fan part has an impeller that rotates around a central axis. The housing part houses the fan part. Here, the housing part has a cylindrical wall part. The cylindrical wall part extends along the central axis and covers the impeller from the outside in a radial direction. The impeller has a plurality of blade parts disposed in a circumferential direction. A cutting mark is formed in at least a part of an inner peripheral surface of the cylindrical wall part facing the blade parts in the radial direction or in an outer end part in the radial direction of the blade parts.
An optical member includes a light-transmissive member, a hard coat layer covering the light-transmissive member, and an antireflection layer covering the hard coat layer. The antireflection layer is configured such that the high refractive index films and the low refractive index films are alternately stacked. The high refractive index film contains Si3N4. The low refractive index film contains SiO2. The total number of films of the high refractive index films and the low refractive index films is an even number. For each of the high refractive index film and the low refractive index film in the antireflection layer, of two adjacent films, a ratio of thickness of a thick film to thickness of a thin film is six times or less. An average reflectance of the antireflection layer in a wavelength range of 300 to 400 nm is 40% or more.
In a motor, a rotor is supported by a bearing to be rotatable about a central axis extending in an axial direction. The rotor includes a rotor lid portion and a first protruding portion. The rotor lid portion extends in a radial direction. The first protruding portion protrudes in one axial direction from the rotor lid portion, extends along the central axis, and is rotatably supported by a bearing. The bearing has a cylindrical shape extending in the axial direction and surrounds the first protruding portion. A hole extending in another axial direction is located in an end portion in the one axial direction of the first protruding portion. An axial length of the hole is less than about half of an axial length of the first protruding portion.
A stator of a multi-phase motor includes a lead-out portion including one or more adjacent slots. A winding is divided into phase windings corresponding to multiple phases. Each of the phase windings includes winding portions wound around a tooth, a connecting wire connecting the winding portions, and a starting end portion and a terminating end portion where both terminals of the phase winding are led out. At least one of the phase windings includes a first winding portion wound around the tooth farther on one side in a circumferential direction than the lead-out portion, a second winding portion wound around the tooth farther on another side in the circumferential direction than the lead-out portion, and a first connecting wire connecting the first winding portion and the second winding portion on one side in an axial direction of the lead-out portion.
A laminated core includes a first connecting portion and a first groove. The first connecting portion connects back yoke portions in the stacking direction on an outer peripheral surface of a portion of a back yoke staked portion, the portion including an end portion on one side in the extending direction of an iron core piece. The first groove is located in a direction opposite to a first direction that is a direction from one side edge toward the other side edge in the iron core piece across the one side edge in the extending direction of the iron core piece with respect to the first connecting portion, and extends in the stacking direction of the back yoke stacked portion on the outer peripheral surface of the back yoke stacked portion.
H02K 15/02 - Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
This lens unit includes a first lens disposed on a subject side, and a second lens disposed on an imaging surface side. The first lens and the second lens are disposed in a direction of an optical axis. The first lens and the second lens are in contact with each other at least at three or more locations and are in contact with each other outside optically effective regions of the lenses. In the lens unit, a cross section of a portion where at least one of the first lens and the second lens contacts the other of the first lens and the second lens, the cross section being taken along a plane including the optical axis and the portion, has a convex shape toward the other lens.
G02B 7/02 - Mountings, adjusting means, or light-tight connections, for optical elements for lenses
G03B 30/00 - Camera modules comprising integrated lens units and imaging units, specially adapted for being embedded in other devices, e.g. mobile phones or vehicles
60.
MOTOR CONTROL DEVICE, MOTOR MODULE, MOTOR CONTROL PROGRAM, AND MOTOR CONTROL METHOD
A motor control device according to one aspect of the present disclosure comprises an inverter circuit, an energization control unit, and a determination unit. The inverter circuit has an upper arm and a lower arm for each of three phases. The energization control unit controls energization of the upper arm and the lower arm of each of the three phases of the inverter circuit. The determination unit determines switching from a 120-degree energization mode in which two phases among three phases are energized phases and the remaining one phase is a non-energized phase to a three-phase modulation antiphase mode in which the three phases are PWM phases that are PWM-controlled, and one of the three phases and the other two phases are PWM-controlled in antiphase in which the phases of energizing waveforms that turn on and off the upper arm are different from each other. The energization control unit includes a switching compensation unit that matches the on and off states of the upper arm and the lower arm of the two energized phases before and after the switching from the 120-degree energization mode to the three-phase modulation antiphase mode determined by the determination unit, and, when two PWM phases respectively corresponding to the energized phases are in phase with each other, performs PWM control in antiphase to the two PWM phases for the PWM phase corresponding to the non-energized phase.
H02M 7/48 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
H02P 27/08 - Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using DC to AC converters or inverters with pulse width modulation
A motor includes a rotor and a stator. The rotor includes a shaft extending in the axial direction of the central axis, and a rotor core having a shaft insertion hole into which the shaft is inserted. The motor has a fan that is fixed to the shaft or the rotor core at a position axially outside the rotor core and rotates together with the rotor core. The rotor core has an air passage. The shaft has a shaft inner passage. The air passage includes a first rotor core opening opened to an axial end surface of the rotor core and a second rotor core opening opened to an inner surface of the shaft insertion hole. The shaft inner passage includes a first shaft opening opened at a position on the axially outer side with respect to the fan, and a second shaft opening opened at a position connected to the second rotor core opening.
Provided are: an on-vehicle lens having a resin as a main component and a transparent base member, wherein a hard coat layer and an antireflection layer are provided on at least one surface of the base member, the antireflection layer is provided on the side opposite to the base member with respect to the hard coat layer, the region from a lens effective diameter to an edge part in the base member is defined as an effective diameter outer region, and the antireflection layer is covered with a functional film for absorbing ultraviolet rays in the effective diameter outer region; a lens unit having the on-vehicle lens; and a camera module having the lens unit.
G02B 1/04 - Optical elements characterised by the material of which they are madeOptical coatings for optical elements made of organic materials, e.g. plastics
A motor includes a main body portion, including a rotor and a stator, a case including a bottom and an opening, and accommodating the main body portion, a busbar assembly, which is located on an axially upper side of the main body portion, and a cover portion, which is located on an axially upper side of the busbar assembly and covers the opening of the case. An upper surface of the busbar assembly is provided with a groove. A first through hole opposite to the groove in an axial direction is defined in the cover portion, and the motor is connected to an external device through the groove and the first through hole. The motor is connected to the external device through the groove and the first through hole, so that a portion of the external device can be accommodated in the busbar assembly.
A stator core includes a tooth portion having a first core and a second core that is connected to a radially inner side of the first core. In at least one slot between the tooth portions adjacent to each other in the circumferential direction, the first core includes a first umbrella portion at a radially inner end portion, the first umbrella portion being located on both sides in the circumferential direction of the slot and protruding in the circumferential direction, and the second core includes a second umbrella portion at a radially inner end portion, the second umbrella portion being located on both sides in the circumferential direction of the slot and protruding in the circumferential direction.
In an electronic device, one end of a cable is on one side end surface in a third direction of a substrate extending in first and second directions. The cable includes a conductive wire, an insulating portion, and an opening portion. The conductive wire extends in the first direction. The opening portion is on the other end surface in the third direction of the insulating portion and opens at least to the other side in the third direction. One side end portion in the first direction of the conductive wire is drawn from the insulating portion to one side in the first direction, and is connected to the one side end surface in the third direction of the substrate. At least a portion of an adhesive on the one side end surface in the third direction of the substrate is in the opening portion.
H01R 12/62 - Fixed connections for flexible printed circuits, flat or ribbon cables or like structures connecting to rigid printed circuits or like structures
The present invention comprises: a rotor that can rotate about the central axis; a stator that has a stator core that faces the rotor via a gap in the radial direction; and a guide member that is disposed on one side of the stator core in the axial direction and that supplies a refrigerant in the circumferential direction. The stator core is provided with a plurality of stator flow paths which penetrate the stator core in the axial direction and through which the refrigerant flows. Each of the plurality of stator flow paths is disposed at a position different from each other in the circumferential direction. The guide member has a connection flow path part connecting the plurality of stator flow paths and is constituted by a plurality of flow path members stacked in the axial direction.
A motor includes a stator core and a busbar assembly on an axial side of the stator core, the busbar assembly includes a busbar holder and busbars each partially embedded into the busbar holder, each busbar includes a claw portion exposed from the busbar holder, teeth of the stator core are insulated from a coil wound on the teeth through an insulator, the busbar holder includes an annular main body portion, and the main body portion is radially opposite to the insulator. By arranging the main body portion of the busbar holder to be radially opposite to the insulator, the busbar holder does not occupy an additional axial dimension, thus reducing an axial length of the motor and miniaturizing the motor.
H02K 3/50 - Fastening of winding heads, equalising connectors, or connections thereto
H02K 1/18 - Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
H02K 3/34 - Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation
A power converter includes: a conversion circuit for conversion between DC power and N-phase AC power (N33); and a control unit controlling 2N switches. The control unit periodically switches between a first PWM mode in which a high-side or a low-side switch of one phase among the 2N switches is turned on and the switches of the remaining phases are controlled by PWM, and a second PWM mode in which the switches of all phases among the 2N switches are controlled by PWM. The sum of the first period of the first PWM mode and the second period of the second PWM mode is shorter than 1/2N of one electrical angle cycle of the AC waveform of the AC power. The first period is equal to or longer than one cycle of PWM. The ratio of the first period to the sum of the first and second periods is variable.
H02M 7/5387 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
69.
AUTONOMOUS TRAVELING DEVICE AND AUTONOMOUS TRAVELING DEVICE CONTROL METHOD
One aspect of an autonomous traveling device includes: a recognition unit that recognizes an obstacle for each of right and left regions sandwiching a body of the autonomous traveling device; a direction calculation unit that calculates a direction along the obstacle for each of the right and left regions; and a deviation control unit that causes the body to move away from the obstacle by combining a rotational movement that changes orientation of the body toward an intermediate direction of each of the directions calculated by the direction calculation unit and a backward movement that causes the body to move backward.
A rotor according to one aspect of the present invention is a rotor that is provided to a rotating electrical machine, opposes a stator, and rotates about a central axis line. The rotor includes: a plurality of magnetic pole parts lined along a circumferential direction centered on the central axis line; and a rotor core that supports the magnetic pole parts from one side of a radial direction. The magnetic pole part includes a main magnet whose magnetization direction is the radial direction; and secondary magnets whose magnetization directions are directions tilted in a circumferential direction with respect to the radial direction, the secondary magnets being disposed symmetrically with each other on an outer side of the main magnet in the circumferential direction. At least some of side faces of the secondary magnet extending in the axial direction are flat faces that are parallel or orthogonal to the magnetization direction.
A motor control device includes a model following controller to generate a correction torque based on an output from a control target that is a motor, and correct an input to the control target with the correction torque. A model following controller includes a high-pass filter with a first cutoff frequency and a low-pass filter with a second cutoff frequency larger than the first cutoff frequency, and is configured or programmed so that a transfer function of a control target is constrained to a nominal model in a frequency band in which a gain in a gain characteristic of Q(s)·HPF(s) is 1 where Q(s) is a transfer function of the low-pass filter and HPF(s) is a transfer function of the high-pass filter.
One embodiment of the gate drive circuit according to the present invention drives a switching element and comprises: a charging circuit that charges the input capacitance of a switching element by applying a gate voltage to the gate terminal of the switching element; and a discharging circuit that discharges the input capacitance. The charging circuit has: a first charging path having a series circuit in which a first switch and an inductor are connected in series between a first terminal and a first node; and a second charging path in which a second switch is connected between the first terminal and the first node. When the switching element is turned on, charging is performed through the first charging path after charging through the second charging path. The discharging circuit has a configuration in which a path through which the discharge current flows from the gate terminal is switched between a first discharging path and a second discharging path having a resistance value higher than that of the first discharging path.
H02M 7/48 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
A motor includes a rotor, a stator, a casing accommodating the rotor and the stator and including an opening in an axial end, an upper bus bar assembly including an upper bus bar holder mounted on an edge of the opening of the casing and an upper bus bar (including an upper bus bar terminal) held on the upper bus bar holder, and a lower bus bar assembly including a lower bus bar holder located on an axially lower side of the upper bus bar holder and a lower bus bar (including a lower bus bar terminal) held on the lower bus bar holder. The upper bus bar terminal and the lower bus bar terminal are electrically connected inside the casing.
H02K 11/00 - Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
H02K 5/04 - Casings or enclosures characterised by the shape, form or construction thereof
H02K 7/00 - Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
A control device controls an N-phase inverter that applies voltage to each of N phases when N is an odd number of three or more. The control device includes a current detection unit and a calculation unit. When a phase to which (N+1)/2-th largest voltage is applied at a current detection time among voltages applied to the N phases is defined as an intermediate phase, the current detection unit detects current of each of the (N−1) phases other than the intermediate phase among currents of the N phases. The calculation unit calculates a current value of current in the intermediate phase based on a detection result of the current detection unit.
H02P 27/08 - Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using DC to AC converters or inverters with pulse width modulation
A blower includes a motor having a shaft and a stator, an impeller connected to and rotating about the shaft, a first housing between the motor and impeller, and a second housing opposite to the first housing across the motor. The second housing includes a bearing holding portion holding a bearing of the shaft, a stator holding portion outside the bearing holding portion and holding the stator, and a coupling portion coupling the bearing holding portion and stator holding portion. The dimension in the axial direction of the shaft is a first dimension and the dimension in the circumferential direction of the shaft is a second dimension among dimensions of the end portion of the coupling portion on the bearing holding portion side. The first dimension is smaller than the second dimension. A portion of the coupling portion has a dimension in the axial direction smaller than the first dimension.
F04D 25/06 - Units comprising pumps and their driving means the pump being electrically driven
A47L 5/22 - Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum with rotary fans
A motor includes a rotor, a stator, and a labyrinth portion. The rotor is rotatable about a central axis extending in an axial direction. The stator includes a stator core. In the stator core, a labyrinth portion in which coils arranged in a circumferential direction are located includes a pair of metal cylindrical portions surrounding the central axis. The pair of metal cylindrical portions includes a pair of opposing surfaces that oppose each other in a radial direction with a gap therebetween, and one of the opposing surfaces surrounds the other.
H02K 5/10 - Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. of water or fingers
H02K 1/18 - Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
H02K 5/15 - Mounting arrangements for bearing-shields or end plates
A rotor rotatable about a central axis extending in an axial direction includes a yoke that is a cylindrical magnetic body extending in the axial direction. A plurality of ridge portions of the yoke are connected to one axial end of the yoke cylindrical portion in a cylindrical shape and extending in the axial direction, and are arranged at intervals in the circumferential direction. In each ridge portion, a protrusion protrudes radially inward from one axial end of the yoke cylindrical portion. Further, an extension extends in the other axial direction from the radially inner end of the protrusion along the radially inner surface of the yoke cylindrical portion. A magnet is located between the extensions adjacent to each other in the circumferential direction. The ridge portion is integral with the yoke cylindrical portion to define a single structure.
H02K 1/30 - Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures using intermediate parts, e.g. spiders
H02K 15/03 - Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies having permanent magnets
H02K 21/22 - Synchronous motors having permanent magnetsSynchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating around the armatures, e.g. flywheel magnetos
A flight vehicle includes a driver, a battery, a main body, a leg, and an annular power receiving coil. The driver is operable to rotate a rotor blade about a rotation axis. The battery is chargeable/dischargeable and supplies power to the driver. The main body accommodates the battery. The leg supports the main body during landing. The power receiving coil is electrically connected to the battery. The leg includes a landing portion that contacts the landing surface during landing. At the time of landing, the central axis of the power receiving coil extends parallel or substantially parallel to a normal direction of the landing surface. The power receiving coil is located on or in the landing portion.
B64U 50/38 - Charging when not in flight by wireless transmission
B60L 50/60 - Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
B60L 53/126 - Methods for pairing a vehicle and a charging station, e.g. establishing a one-to-one relation between a wireless power transmitter and a wireless power receiver
B64U 101/60 - UAVs specially adapted for particular uses or applications for transporting passengersUAVs specially adapted for particular uses or applications for transporting goods other than weapons
H02J 50/12 - Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
An aspect of a signal generation device of the present invention includes a processing device that calculates angle information indicating a mechanical angle of a rotary shaft, and generates a first signal in which a waveform of one electrical angle cycle appears N times (N is an integer of one or more) in one mechanical angle cycle, and a second signal different in phase by 90 degrees in electrical angle from the first signal, based on a calculation result of the angle information.
G01B 7/30 - Measuring arrangements characterised by the use of electric or magnetic techniques for measuring angles or tapersMeasuring arrangements characterised by the use of electric or magnetic techniques for testing the alignment of axes
B66B 1/34 - Control systems of elevators in general Details
G01D 5/14 - Mechanical means for transferring the output of a sensing memberMeans for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for convertingTransducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
One embodiment of an actuator according to the present invention is provided in a steer-by-wire type steering device mounted in a vehicle, and generates a steering reaction force on a steering wheel of the vehicle. The actuator is provided with a motor for generating the steering reaction force, around a central axis, in the steering wheel. The motor has a rotor and a stator. The stator is disposed facing the rotor in the axial direction. In the actuator according to the present invention, a speed reduction mechanism is not provided between the motor and the steering wheel.
A control device that controls a steering mechanism mounted on a vehicle includes a first assist controller to execute lane keeping control and generate a first input value. The first assist controller includes a vehicle state calculator to calculate a yaw rate target value and lateral displacement, a yaw rate controller to generate a yaw rate command value based on the yaw rate target value, and a lateral displacement controller to generate a lateral displacement command value based on the lateral displacement. The yaw rate controller includes a yaw rate adjuster to adjust the yaw rate command value according to a frequency. The lateral displacement controller includes a lateral displacement adjuster to adjust the lateral displacement command value according to a frequency.
A motor control device that controls a motor includes a calculator to calculate angle information related to a rotation angle of a rotor of the motor based on an output from a magnetic sensor, and a corrector to correct the angle information calculated by the calculator. The magnetic sensor is a sensor that includes a magnetoresistance effect element and outputs signals of two systems out of phase with each other by 180°. The corrector corrects the angle information using a correction amount expressed by a function including a current value of a motor current supplied to a stator of the motor and a phase angle of the motor current, a current value of a power source current supplied to the motor control device, and a mechanical angle of the rotor calculated based on an output from the magnetic sensor.
H02P 21/00 - Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
H02K 9/22 - Arrangements for cooling or ventilating by solid heat conducting material embedded in, or arranged in contact with, the stator or rotor, e.g. heat bridges
H02K 11/01 - Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for shielding from electromagnetic fields
H02K 11/215 - Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements
H02K 11/30 - Structural association with control circuits or drive circuits
H02P 21/06 - Rotor flux based control involving the use of rotor position or rotor speed sensors
H02P 21/14 - Estimation or adaptation of machine parameters, e.g. flux, current or voltage
H02P 21/22 - Current control, e.g. using a current control loop
A refrigerant circulation device includes a primary flow path serving as a flow path of a primary refrigerant, a secondary flow path serving as a flow path of a secondary refrigerant, a heat exchanger connected to the primary flow path and the secondary flow path, a pump connected to the secondary flow path, and a housing including an accommodation region extending in a first direction and a second direction intersecting each other and having a dimension longer in the first direction than in the second direction. The housing accommodates the primary flow path, the secondary flow path, the heat exchanger, and the pump in the accommodation region. An entirety of the heat exchanger is positioned on one side in the second direction relative to the pump.
One embodiment of the motor according to the present invention is a motor which is provided to a steer-by-wire type steering device installed in a vehicle and which generates a steering reaction force in a steering wheel of the vehicle, the motor comprising: a rotor that can rotate around a central axis; a stator that faces the rotor with a gap therebetween; and a bearing that rotatably supports the rotor. The rotor has a motor shaft that extends in the axial direction of the central axis and a rotor body that is fixed to the motor shaft. The stator is disposed so as to face the rotor body in the axial direction and has an annular shape surrounding the motor shaft. At least part of the bearing is located inwardly of the stator in the radial direction.
One embodiment of this motor is to be provided to a steer-by-wire steering device that is installed on a vehicle. The motor generates steering reaction force at a steering wheel of the vehicle and comprises a rotor that can rotate around a center axis and a stator that is opposite the rotor with a gap therebetween. The rotor has a motor shaft that extends in the axial direction of the center axis and a rotor body that is fixed to the motor shaft. The stator is provided opposite the rotor body in the axial direction. The motor shaft is directly connected to the steering wheel.
A motor includes a rotor, a stator, and a casing. The stator includes an iron core and a resin portion covering the iron core. The resin portion includes an abutting portion to abut against a bottom of the casing on one axial side in the casing. The abutting portion is connected in a ring shape around the entire circumference of a central axis, and is closer to a radially inner side than a radially central position of the stator. There is a gap between one axial side of the stator and the casing in the axial direction, and the gap defines a first space. The abutting portion is located on a radially inner side of the first space. The motor is able to prevent debris from invading the rotor.
H02K 5/10 - Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. of water or fingers
An electric power unit accommodates an electric motor in a first portion of a housing, and an inverter in a second portion of the housing. An upper surface opening portion of the second portion is covered with an inverter cover having a flat plate shape. A first region, a second region, and a third region sandwiched between the first region and the second region are formed on an upper surface of the inverter cover. A first connection portion is arranged in the first region. Second connection portions are arranged in the second region. A plurality of ribs are arranged in parallel in the third region. The first rib having one longitudinal end portion connected to the first connection portion and the second rib connected to the second connection portions are arranged in a direction in which the first rib and the second rib are arranged in parallel.
A joint assembly includes a joint including a flow path penetrating therethrough, and a fixing portion to which the joint is attached. The joint includes at least two mounting portions to which a tube is mounted, and an intermediate portion located between the at least two mounting portions. The fixing portion extends in a first intersecting direction intersecting the flow path and abuts on the intermediate portion.
According to the present invention, a stator core, a coil part, and a circuit board of a motor are accommodated in a lidded cylindrical cover member and are covered with a covering member that fills the inside of the cover member. A guide part of the cover member is disposed at an end part on one side in the axial direction of a board accommodation part that surrounds and thereby accommodates the circuit board. A lead wire is led from the circuit board to the outside of the cover member, and the guide part accommodates the lead wire and guides the lead wire to the outside in the radial direction. An end part on the inside in the radial direction of a side wall part of the guide part is connected to the end part on the one side in the axial direction of the board accommodation part. An end part on the one side in the axial direction of the side wall part is positioned further to the one side in the axial direction than the end part on the one side in the axial direction of the board accommodation part.
H02K 5/22 - Auxiliary parts of casings not covered by groups , e.g. shaped to form connection boxes or terminal boxes
F04D 25/08 - Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
H02K 5/10 - Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. of water or fingers
A substrate of this motor is disposed on one side of a stator in an axial direction and widens in a direction crossing a center axis. A heat dissipation member is disposed between the stator and the substrate. The stator has a first housing and a second housing. The first housing has a lid-equipped cylindrical shape that opens toward one side in the axial direction and surrounds a stator core. The second housing is connected to the first housing and sandwiches the stator core between the second housing and the first housing in the axial direction. The heat dissipation member is in contact with the second housing and a circuit element mounted on the other end surface of the substrate in the axial direction.
H02K 11/33 - Drive circuits, e.g. power electronics
A47L 9/00 - Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating actionStoring devices specially adapted to suction cleaners or parts thereofCarrying-vehicles specially adapted for suction cleaners
F04D 29/58 - CoolingHeatingDiminishing heat transfer
H02K 7/14 - Structural association with mechanical loads, e.g. with hand-held machine tools or fans
This multi-motor system comprises a host device and a plurality of motor units. The plurality of motor units communicate with the host device. Each of the plurality of motor units is assigned an identifier for enabling unique identification of the relevant motor unit within a communication network. The communication network includes the host device and the plurality of motor units. Each of the plurality of motor units has a motor, a storage device, and a communication circuit. The storage device stores the identifier. The communication circuit transmits the identifier to the host device.
A synchronous reluctance motor includes magnetic barriers in each magnetic barrier group of a rotor core, each having a shape which protrudes toward a radial inner side and is symmetrical about a q-axis. A portion closer to a circumferential side than the q-axis includes a first portion extending perpendicular to the q-axis and a second portion extending farther toward the circumferential side from a circumferential side of the first portion and radially outward, and the first portions of the magnetic barriers in each magnetic barrier group have the same radial dimension. The first portions of the magnetic barriers other than the radial outermost magnetic barrier have the same circumferential dimension, which is the same as or twice a circumferential dimension of the first portion of the radial outermost magnetic barrier.
A rotary electric machine includes: a rotor having a shaft extending in an axial direction and rotor magnets arranged along a circumferential direction; a stator having a coil and surrounding the rotor; a housing supporting the stator; a pair of magnetic bearings on opposite sides in the axial direction of the rotor magnet; and a position adjusting member held by the housing. The stator holds the rotor rotatably in the axial direction by a field current flowing through the coil. The magnetic bearing includes a cylindrical inner magnet fixed to the rotor and a cylindrical outer magnet fixed to the housing and surrounding the inner magnet, and holds the rotor rotatably in the radial direction. The rotor has a stepped surface facing the axial direction. The position adjusting member has an opposing surface facing the stepped surface, and is movable in the axial direction with respect to the housing.
Nidec Motion Control Technology (Guangdong) Co., LTD (China)
NIDEC CORPORATION (Japan)
Inventor
Yen, Sheng-Chan
Luo, Ta-Yin
Wang, Tian-Bao
Zhou, Zhi-Min
Gu, Zeng-Xiang
Wu, Ruo-Hui
Wei, Sheng-Wang
Abstract
Embodiments of the present application provide a rotor and a motor. The rotor has a plurality of through-hole groups. Each through-hole group has a plurality of through-holes distributed in a radial direction. The rotor also has auxiliary holes. Each auxiliary hole is located between every two radially adjacent through-holes. A sectional area of each auxiliary hole is less than a sectional area of each through-hole. When a first angle, a second angle and a third angle are defined between three portions of each auxiliary hole and the q-axis respectively, the third angle is greater than or equal to the first angle, and the third angle is less than or equal to the second angle.
This base plate constitutes a part of a housing of a disk drive device, and is formed from a metal plate and a die-cast part. The metal plate includes a board-shaped bottom plate portion that spreads out perpendicular to an up-down extending axis of rotation of a disk. The die-cast part covers at least a part of the bottom plate portion. Metal which constitutes the bottom plate portion is higher in rigidity than metal which constitutes the die-cast part.
A motor control device includes a conversion circuit that is connected to an n-phase motor, and a control unit that controls the conversion circuit based on n-phase duty command values updated at a predetermined update cycle. When the control unit predicts, based on the n-phase duty command values, that voltage fluctuations of at least two-phase connection terminals among the n-phase connection terminals connected to the n-phase motor occur in the same direction and at the same timing, the control unit delays the occurrence timing of the voltage fluctuation of one of the two-phase connection terminals by a first time and advances the occurrence timing of the voltage fluctuation of another connection terminal by a second time. The total value of the first time and the second time is a predetermined time during which predetermined occurrence timings of the voltage fluctuations of the two-phase connection terminals do not overlap each other.
H02P 27/14 - Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using DC to AC converters or inverters with pulse width modulation with three or more levels of voltage
97.
BASE PLATE, SPINDLE MOTOR, DISK DRIVE DEVICE, AND BASE PLATE MANUFACTURING METHOD
A base plate becomes a part of a housing of a disk drive device and is made of a metal die-cast member. The base plate includes a bottom wall portion and a cylindrical wall portion. The bottom wall portion extends perpendicular to a rotation axis of a disk extending in a vertical direction. The cylindrical wall portion protrudes upward from an upper surface of the bottom wall portion along the rotation axis and has a shaft through hole through which a shaft is inserted. The cylindrical wall portion has an annular stepped portion that protrudes radially outward from an outer peripheral surface of a root portion. A processed surface is formed on at least a part of an outer peripheral surface of the stepped portion.
A motor includes a rotor and a stator. The rotor can rotate around a central axis extending in an axial direction. The stator rotationally drives the rotor. The stator includes a stator core, a coil portion, an inner casing, and a heat conductor. The stator core has an annular shape surrounding the central axis. The coil portion is located in the stator core. The inner casing surrounds and accommodates the stator core and the coil portion in the inside and holds the stator core. The heat conductor is in contact with an axial end portion of the coil portion and the inner casing.
H02K 9/22 - Arrangements for cooling or ventilating by solid heat conducting material embedded in, or arranged in contact with, the stator or rotor, e.g. heat bridges
A47L 5/28 - Suction cleaners with handles and nozzles fixed on the casings, e.g. wheeled suction cleaners with steering handle
A47L 9/28 - Installation of the electric equipment, e.g. adaptation or attachment to the suction cleanerControlling suction cleaners by electric means
F04D 1/00 - Radial-flow pumps, e.g. centrifugal pumpsHelico-centrifugal pumps
F04D 13/06 - Units comprising pumps and their driving means the pump being electrically driven
F04D 29/58 - CoolingHeatingDiminishing heat transfer
H02K 5/20 - Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
H02K 9/06 - Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
A power conversion device includes a first module that is a heating element, a second module that is a heating element having a larger calorific value than the first module, a housing having an accommodation space for accommodating the first module and the second module, and a refrigerant flow path through which a refrigerant flows. The housing has a lid that covers the accommodation space. The refrigerant flow path includes a first flow path portion that is disposed outside the accommodation space and cools the first module via the lid, and a second flow path portion that is disposed inside the accommodation space and cools the second module.
A motor includes a heat dissipation portion located in one axial direction from a coil portion located on a stator core of a magnetic body. The heat dissipation portion is separate from a bracket, and is held by a stator holder of the bracket. The heat dissipation portion includes an annular portion having an annular shape surrounding the stator holder and being located on a radially outer surface of the stator holder. An extension extends radially outward from the annular portion.
H02K 9/22 - Arrangements for cooling or ventilating by solid heat conducting material embedded in, or arranged in contact with, the stator or rotor, e.g. heat bridges
