Abstract

Systems, methods, and media for power conversion with electromagnetic interference (EMI) mitigation. The power conversion includes a variable-frequency power converter with a direct current (DC) voltage section including a DC bus with a positive DC node and a negative DC node, and a switch-side section including connection nodes. The variable-frequency power converter includes a DC link capacitor connected across the DC bus and a half-bridge circuit with power switching elements and an LC filter. The power conversion further includes an EMI filter connected across the DC bus or the connection nodes, the EMI filter including an EMI inductor, a first capacitor, and a second capacitor, wherein the first and second capacitor are connected at a ground node. The power conversion further includes a control system coupled to the variable-frequency power converter, the control system is configured to control the variable-frequency power converter to convert power.

IPC Classes  ?

• H02M 1/08 - Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
• H02M 1/084 - Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters using a control circuit common to several phases of a multi-phase system
• H02M 1/12 - Arrangements for reducing harmonics from AC input or output
• H02M 1/14 - Arrangements for reducing ripples from DC input or output
• H02M 7/219 - Conversion of AC power input into DC 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 in a bridge configuration
• H02M 7/521 - 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 thyratron or thyristor type requiring extinguishing means using semiconductor devices only in a bridge configuration
• 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
• H02M 1/42 - Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
• H02M 7/162 - Conversion of AC power input into DC 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 thyratron or thyristor type requiring extinguishing means using semiconductor devices only in a bridge configuration
• H02M 7/217 - Conversion of AC power input into DC 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
• H02M 7/537 - 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
• H02M 7/72 - Conversion of AC power input into DC power outputConversion of DC power input into AC power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
• H02M 7/757 - Conversion of AC power input into DC power outputConversion of DC power input into AC power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only
• H02M 7/758 - Conversion of AC power input into DC power outputConversion of DC power input into AC power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only with automatic control of output waveform or frequency
• H02M 7/797 - Conversion of AC power input into DC power outputConversion of DC power input into AC power output with 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

Abstract

d-q-δ-σ-σ-axis) component. The delta axis component indicates a difference between a common mode and a neutral electrical characteristic, and the sigma axis component indicates a sum of the common mode and the neutral electrical characteristic. The control system drives the power switching elements of the four phase legs in accordance with the control reference targets.

IPC Classes  ?

• H02J 7/14 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle
• H02M 1/38 - Means for preventing simultaneous conduction of switches
• H02M 7/68 - Conversion of AC power input into DC power outputConversion of DC power input into AC power output with possibility of reversal by static converters
• H02M 7/72 - Conversion of AC power input into DC power outputConversion of DC power input into AC power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
• H02M 7/797 - Conversion of AC power input into DC power outputConversion of DC power input into AC power output with 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
• H02M 7/81 - Conversion of AC power input into DC power outputConversion of DC power input into AC power output with 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 arranged for operation in parallel
• H02J 7/16 - Regulation of the charging current or voltage by variation of field
• H02J 7/24 - Regulation of the charging current or voltage by variation of field using discharge tubes or semiconductor devices
• H02M 1/08 - Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
• H02M 1/084 - Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters using a control circuit common to several phases of a multi-phase system
• H02M 1/088 - Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
• H02M 7/66 - Conversion of AC power input into DC power outputConversion of DC power input into AC power output with possibility of reversal
• H02M 7/79 - Conversion of AC power input into DC power outputConversion of DC power input into AC power output with 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

Abstract

Systems and methods are provided for controlling the application of current to stator and rotor windings of a motor. An electric machine includes a stator including stator windings. A stator controller is configured to control current through the stator winding to generate a wireless power signal. A rotor includes a rotor winding and a rotor circuit. The rotor circuit includes a switch bridge coupled to the rotor winding and a capacitor coupled across the switch bridge. The rotor winding receives the wireless power signal from a stator winding of the stator windings. A rotor controller determines a capacitor voltage, a reference current based on the capacitor voltage, and a rotor current through the rotor winding. The rotor controller controls the switch bridge of the rotor circuit to change a switching state based on the reference current and the rotor current.

IPC Classes  ?

• H02K 17/12 - Asynchronous induction motors for multi-phase current
• H02K 17/30 - Structural association of asynchronous induction motors with auxiliary electric devices influencing the characteristics of the motor or controlling the motor, e.g. with impedances or switches
• H02P 23/06 - Controlling the motor in four quadrants
• H02P 23/07 - Polyphase or monophase asynchronous induction motors
• H02P 23/28 - Controlling the motor by varying the switching frequency of switches connected to a DC supply and the motor phases
• H02K 17/02 - Asynchronous induction motors
• H02K 17/06 - Asynchronous induction motors for single phase current having windings arranged for permitting pole-changing
• H02K 17/14 - Asynchronous induction motors for multi-phase current having windings arranged for permitting pole-changing
• H02K 17/22 - Asynchronous induction motors having rotors with windings connected to slip-rings
• H02K 23/10 - DC commutator motors or generators having mechanical commutatorUniversal AC/DC commutator motors characterised by arrangement for exciting having compound connection of excitation windings

Abstract

Disclosed are interleaved power converter systems and methods including an interleaved power converter module and a control system. The converter module includes DC link nodes, a first transistor pair and a second transistor pair coupled between the DC link nodes, an LC filter circuit, and AC nodes. The control system includes a central controller and one or more local controllers. Each local controller receives a respective reference target from the central controller, generates a variable frequency soft switching (VFSS) control signal to drive the first transistor pair to output a first AC signal, and generates a phase-shifted VFSS control signal to drive the second transistor pair to output a second AC signal that is phase-shifted with respect to the first AC signal. The interleaved power converter module outputs, via the LC filter circuit, an interleaved signal comprising the first AC signal interleaved with the second AC signal.

IPC Classes  ?

• H02M 1/00 - Details of apparatus for conversion
• H02M 1/08 - Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
• H02M 3/15 - Conversion of DC power input into DC power output without intermediate conversion into AC 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 discharge tubes only
• H02M 3/33 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using discharge tubes only
• 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

Abstract

A power conversion system and method for an electric vehicle includes a bidirectional power system including control circuitry that is electrically connected to interface circuitry and a power converter. The control circuitry is configured to: control, when the control circuitry detects an electrical connection between the interface circuitry and an external power network, a load to output a DC voltage from the load to the power converter; control, when the control circuitry determines that a mode command from a user control includes a traction mode instruction, the load to output the DC voltage from the load to the power converter; and control, when the load outputs the DC voltage, the power converter in a manner that causes the power converter to convert the DC voltage into an electric current.

IPC Classes  ?

• H02M 7/81 - Conversion of AC power input into DC power outputConversion of DC power input into AC power output with 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 arranged for operation in parallel
• H02J 7/02 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from AC mains by converters
• 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

Abstract

A rotor chipset assembly and an electric motor including the assembly are provided. The assembly comprises a printed circuit board having opposing first and second surfaces, the printed circuit board including a plurality of electronic components each having an outward surface, wherein the first, second, and outward surfaces define a board surface profile; a cooling jacket coupled to the printed circuit board, the cooling jacket including an inner surface that faces the board surface profile, wherein the cooling jacket includes a fluid inlet port proximate a first end of the printed circuit board, and wherein the cooling jacket includes a first jacket portion that faces the first surface of the printed circuit board and a second jacket portion that faces the second surface of the printed circuit board; and a coolant fluid pathway volume defined by the board surface profile and the inner surface of the cooling jacket.

IPC Classes  ?

• H02K 11/042 - Rectifiers associated with rotating parts, e.g. rotor cores or rotary shafts
• H02K 11/33 - Drive circuits, e.g. power electronics
• H02K 5/20 - Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
• H02K 9/19 - Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
• H02K 9/193 - Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil with provision for replenishing the cooling mediumArrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil with means for preventing leakage of the cooling medium
• H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating
• H02K 11/04 - Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for rectification
• H02K 11/049 - Rectifiers associated with stationary parts, e.g. stator cores
• H02K 11/05 - Rectifiers associated with casings, enclosures or brackets
• H02K 11/30 - Structural association with control circuits or drive circuits
• H02K 5/04 - Casings or enclosures characterised by the shape, form or construction thereof

Abstract

Disclosed are systems and methods for motor control using optimal efficiency reference generation. An electronic controller may determine current values for a motor in a rotational reference frame. Each current value may be associated with a dimension of a set of dimensions of the rotational reference frame. The electronic controller may further determine, based on the current values, a flux linkage value for each of the set of dimensions of the rotational reference frame using an optimization cost function that considers motor speed, copper loss, and core loss. The electronic controller may further determine a target flux linkage value for each of the set of dimensions of the rotational reference frame. The electronic controller may then control a power switching network coupled between a power supply and the motor based on the flux linkage values and the target flux linkage values.

IPC Classes  ?

• H02P 21/08 - Indirect field-oriented controlRotor flux feed-forward control
• H02P 21/10 - Direct field-oriented controlRotor flux feed-back control
• H02P 21/14 - Estimation or adaptation of machine parameters, e.g. flux, current or voltage
• H02P 21/24 - Vector control not involving the use of rotor position or rotor speed sensors
• H02P 21/26 - Rotor flux based control
• H02P 21/06 - Rotor flux based control involving the use of rotor position or rotor speed sensors
• H02P 21/13 - Observer control, e.g. using Luenberger observers or Kalman filters
• H02P 21/22 - Current control, e.g. using a current control loop
• H02P 21/28 - Stator flux based control
• H02P 21/30 - Direct torque control [DTC] or field acceleration method [FAM]
• H02P 6/34 - Modelling or simulation for control purposes

Abstract

NNNN-phase LC filter comprising one or more capacitors, wherein respective one or more neutral points of the one or more capacitors are electrically connected to a DC negative terminal of a DC source. A control system drives power switching elements of the N-phase power converter stage to convert received power and to output converted power. The control system drives the power switching elements using variable frequency soft switching at a frequency of at least 20 kHz. The power converter may have bidirectional operation to operate in a traction mode to drive a motor or a charging mode to charge a DC source.

IPC Classes  ?

• H02M 7/49 - Combination of the output voltage waveforms of a plurality of converters
• H02M 7/523 - 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 thyratron or thyristor type requiring extinguishing means using semiconductor devices only with LC-resonance circuit in the main circuit
• H02M 7/493 - 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 the static converters being arranged for operation in parallel

Abstract

Disclosed are systems for a modular power converter in a drive unit for a vehicle. The modular power converter includes a first power conversion unit including a first power conversion module disposed within a first housing, the first housing defining a first external recess. The modular power converter further includes a second power conversion unit including a second power conversion module disposed within a second housing. The second housing defines a second external recess and is configured to couple to the first housing so that the first external recess and the second external recess collectively define a first coolant channel between the first housing and the second housing.

IPC Classes  ?

• B60L 15/00 - Methods, circuits or devices for controlling the propulsion of electrically-propelled vehicles, e.g. their traction-motor speed, to achieve a desired performanceAdaptation of control equipment on electrically-propelled vehicles for remote actuation from a stationary place, from alternative parts of the vehicle or from alternative vehicles of the same vehicle train
• B60L 50/50 - Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
• H02M 11/00 - Power conversion systems not covered by the other groups of this subclass

Abstract

An electric machine includes a rotor body defining a rotor axis and including a back iron, a plurality of shanks extending radially away from the back iron, and a plurality of pole caps each removably coupled to a corresponding one of the plurality of shanks. The back iron, shanks, and pole caps can be made of different materials, and the rotor can be refluxed to vary a pole count of the motor. A pre-tensioned retention wrap is provided to help secure the rotor component together and allow for increased rotor speed. A retaining body is positioned between the rotor body and the retention wrap to compensate for thermal expansion and to maintain the retention wrap within a predetermined tension range.

IPC Classes  ?

• H02K 3/487 - Slot-closing devices
• H02K 3/493 - Slot-closing devices magnetic
• H02K 3/50 - Fastening of winding heads, equalising connectors, or connections thereto
• H02K 3/51 - Fastening of winding heads, equalising connectors, or connections thereto applicable to rotors only
• H02K 3/12 - Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
• H02K 3/18 - Windings for salient poles
• H02K 3/46 - Fastening of windings on the stator or rotor structure
• H02K 3/48 - Fastening of windings on the stator or rotor structure in slots

Abstract

Thermal management systems and methods are provided for managing thermal energy of a power converter and components thereof. In one example, a cooling jacket is coupled to a circuit board, where the cooling jacket has an inner surface that mimics a board surface profile formed by outward surfaces of a printed circuit board and electronic components thereon. Coolant fluid is provided through a coolant fluid pathway volume defined by the board surface profile and the inner surface of the cooling jacket. In another example, a cooling jacket covers an outward surface of an electronic component on a printed circuit board. The cooling jacket receives coolant fluid at an injection inlet and directs a jet of the coolant fluid toward the outward surface of the electronic component. The fluid exits the cooling jacket at an opening between the cooling jacket and a surface of the printed circuit board.

IPC Classes  ?

• H01L 23/46 - Arrangements for cooling, heating, ventilating or temperature compensation involving the transfer of heat by flowing fluids
• H01L 23/473 - Arrangements for cooling, heating, ventilating or temperature compensation involving the transfer of heat by flowing fluids by flowing liquids
• H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating
• H01L 23/467 - Arrangements for cooling, heating, ventilating or temperature compensation involving the transfer of heat by flowing fluids by flowing gases, e.g. air
• G06F 1/20 - Cooling means

Abstract

Disclosed are systems and methods for motor control using piecewise affine modelling. An electronic controller may determine current values for a motor in a rotational reference frame. Each current value may be associated with a dimension of a set of dimensions of the rotational reference frame. The electronic controller may further determine, based on the current values, a flux linkage value for each of the set of dimensions of the rotational reference frame using a piecewise affine map. The electronic controller may further determine a target flux linkage value for each of the set of dimensions of the rotational reference frame. The electronic controller may then control a power switching network coupled between a power supply and the motor based on the flux linkage values and the target flux linkage values.

IPC Classes  ?

• H02P 21/08 - Indirect field-oriented controlRotor flux feed-forward control
• H02P 21/10 - Direct field-oriented controlRotor flux feed-back control
• H02P 21/14 - Estimation or adaptation of machine parameters, e.g. flux, current or voltage
• H02P 21/24 - Vector control not involving the use of rotor position or rotor speed sensors
• H02P 21/26 - Rotor flux based control
• H02P 21/06 - Rotor flux based control involving the use of rotor position or rotor speed sensors
• H02P 21/13 - Observer control, e.g. using Luenberger observers or Kalman filters
• H02P 21/22 - Current control, e.g. using a current control loop
• H02P 21/28 - Stator flux based control
• H02P 21/30 - Direct torque control [DTC] or field acceleration method [FAM]
• H02P 6/34 - Modelling or simulation for control purposes

Abstract

Systems and methods are provided for controlling and simulating a motor. An electronic motor controller determines present motor information and a motor control parameter set based on the present motor information and a rotating reference frame of the motor. The rotating reference frame has independent input channels that decouple an intended output response in a stator D-axis component and a rotor field (R) component of a direct-quadrature-null-rotor (DQNR) reference frame. The electronic motor controller further controls the motor based on the motor control parameter set.

IPC Classes  ?

• H02P 21/06 - Rotor flux based control involving the use of rotor position or rotor speed sensors
• H02P 21/08 - Indirect field-oriented controlRotor flux feed-forward control
• H02P 21/10 - Direct field-oriented controlRotor flux feed-back control

Abstract

A reconfigurable electric motor (or machine) that may be reconfigured to improve performance given particular motor conditions. The motor is part of a motor system including a stator, a rotor, a microinverter network including a plurality of microinverters, and a motor controller including processing circuitry. The motor controller controls the plurality of microinverters to drive the motor in accordance with a first configuration of a plurality of motor configurations. The motor controller determines, based on determined motor conditions, to reconfigure the motor from the first configuration to a second configuration, where the first configuration has a first pole count that is different than a second pole count of the second configuration. The motor controller further controls the plurality of microinverters to drive the motor in accordance with the second configuration.

IPC Classes  ?

• H02K 1/02 - Details of the magnetic circuit characterised by the magnetic material
• H02K 1/16 - Stator cores with slots for windings
• H02K 1/24 - Rotor cores with salient poles
• H02K 11/028 - Suppressors associated with the rotor
• H02P 23/14 - Estimation or adaptation of motor parameters, e.g. rotor time constant, flux, speed, current or voltage

Abstract

A stator defines multiple stator poles with associated stator windings. A rotor defines multiple rotor poles with associated rotor windings configured to be energized substantially by the stator. The rotor defines a rotor field energizable by magnetic fields produced by the stator windings to produce relative force between the rotor and the stator. An active rectifier is conductively coupled to one or more first rotor windings. The active rectifier is configured to control a direction of current flow through the one or more first rotor windings responsive to a signal received wirelessly from the stator by one or more second rotor windings.

IPC Classes  ?

• H02P 25/03 - Synchronous motors with brushless excitation
• H02K 19/10 - Synchronous motors for multi-phase current
• H02P 21/00 - Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
• H02P 21/04 - Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation specially adapted for very low speeds
• H02P 9/48 - Arrangements for obtaining a constant output value at varying speed of the generator, e.g. on vehicle
• F03D 9/25 - Wind motors characterised by the driven apparatus the apparatus being an electrical generator
• H02K 7/18 - Structural association of electric generators with mechanical driving motors, e.g.with turbines
• H02P 25/22 - Multiple windingsWindings for more than three phases
• H02K 16/00 - Machines with more than one rotor or stator

Abstract

A stator defines multiple stator poles with associated stator windings. A rotor defines multiple fixed rotor poles with associated teeth with a ferromagnetic material. The fixed rotor poles have associated rotor windings configured to be energized substantially by the stator. Each of the rotor windings is associated with the tooth. Each of the rotor windings includes an alternating current (AC) coil (or auxiliary coil) configured to carry an AC current induced by an AC current flowing in the stator. A direct current (DC) coil (or primary coil) defines a rotor field energizable by magnetic fields produced by the stator windings to produce relative forces between the rotor and the stator. The DC coil is at least partially powered or controlled by the AC coil.

IPC Classes  ?

• H02P 25/03 - Synchronous motors with brushless excitation
• H02K 19/10 - Synchronous motors for multi-phase current
• H02P 21/00 - Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
• H02P 21/04 - Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation specially adapted for very low speeds
• H02P 9/48 - Arrangements for obtaining a constant output value at varying speed of the generator, e.g. on vehicle
• F03D 9/25 - Wind motors characterised by the driven apparatus the apparatus being an electrical generator
• H02K 7/18 - Structural association of electric generators with mechanical driving motors, e.g.with turbines
• H02K 25/22 -
• H02K 16/00 - Machines with more than one rotor or stator

Abstract

An electric machine having a thermal management system includes a stator having a stator core, and a rotor having a rotor core that is moveable relative to the stator. At least one of the stator and the rotor include one or more windings. One or more coolant cans encapsulate one or more of the windings disposed on the at least one of the stator and the rotor in an interior compartment of the coolant can. The interior compartment of the coolant can defines a coolant flow passage through the one or more windings. The coolant can includes a coolant inlet and a coolant outlet in fluid connection with the interior compartment of the coolant can. The interior compartment of the one or more coolant cans are fluidically isolated from the stator core and the rotor core.

IPC Classes  ?

• 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
• H02K 1/20 - Stationary parts of the magnetic circuit with channels or ducts for flow of cooling medium
• H02K 1/32 - Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
• H02K 5/15 - Mounting arrangements for bearing-shields or end plates
• H02K 5/20 - Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
• H02K 9/00 - Arrangements for cooling or ventilating
• H02K 9/16 - Arrangements for cooling or ventilating wherein gaseous cooling medium circulates between the machine casing and a surrounding mantle wherein the cooling medium circulates through ducts or tubes within the casing

Abstract

An electric machine includes a stator and a rotor energizable by magnetic fields produced by the stator when receiving a stator current to produce relative motion between the rotor and the stator. A controller is configured to send the stator current through the stator at a current angle measured from the closest one of a pole of the rotor, determine a desired operational output of the electric machine, and determine a desired rotor motion corresponding to the desired operational output of the electric machine. The controller is further configured to calculate a vector control modulation applied to the stator that elicits the desired rotor motion, and adjust the current angle of the stator current based on the vector control modulation to cause the rotor to perform the desired rotor motion and achieve the desired operational output of the electric machine.

IPC Classes  ?

• H02P 23/14 - Estimation or adaptation of motor parameters, e.g. rotor time constant, flux, speed, current or voltage
• H02P 23/00 - Arrangements or methods for the control of AC motors characterised by a control method other than vector control
• H02K 3/28 - Layout of windings or of connections between windings
• H02K 1/24 - Rotor cores with salient poles
• H02K 1/02 - Details of the magnetic circuit characterised by the magnetic material

Abstract

An electric machine includes a stator defining multiple stator poles with associated stator windings configured to receive a stator current. The electric machine also includes a rotor defining multiple fixed rotor poles with associated rotor windings, wherein the rotor defines a field energizable by magnetic fields produced by the stator windings when receiving the stator current to produce relative motion between the rotor and the stator and wherein the rotor is maintained in synchronicity with the magnetic fields produced by the stator during operation of the electric machine. The electric machine also includes a rectification system configured control against an alternating current being induced in the rotor poles as the field is energized by magnetic fields produced by the stator windings when receiving the stator current.

IPC Classes  ?

• H02K 1/02 - Details of the magnetic circuit characterised by the magnetic material
• H02K 21/14 - Synchronous motors having permanent magnetsSynchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
• H02K 27/00 - AC commutator motors or generators having mechanical commutator
• H02P 7/00 - Arrangements for regulating or controlling the speed or torque of electric DC motors
• H02P 25/00 - Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
• H02P 27/00 - Arrangements or methods for the control of AC motors characterised by the kind of supply voltage

Abstract

A stator defines multiple stator poles with associated electrical windings. A rotor includes multiple rotor poles. The rotor is movable with respect to the stator and defines, together with the stator, a nominal gap between the stator poles and the rotor poles. The rotor poles includes a magnetically permeable pole material. The rotor also includes a series of frequency programmable flux channels (FPFCs). Each FPFC includes a conductive loop surrounding an associated rotor pole. The stator and the rotor are arranged such that the electrical windings in the stator induce an excitement current within at least one of the FPFCs during start-up.

IPC Classes  ?

• H02P 25/022 - Synchronous motors
• H02P 25/03 - Synchronous motors with brushless excitation

Abstract

An electric motor has a stator defining multiple stator poles with associated electrical windings, and a rotor having multiple rotor poles. The rotor has flux barriers between adjacent rotor poles, the flux barriers each having a material with an electrical conductivity higher than the rotor pole material. The flux barriers are electrically isolated from one another external to the ferromagnetic material. Eddy currents are induced in the flux barrier to cause destructive interference of an impending magnetic field, such that the flux barrier effectively acts to inhibit magnetic flux during motor operation, which in some cases will result in a repulsive force that will act to increase an induced motive force on the rotor poles.

IPC Classes  ?

• H02K 1/24 - Rotor cores with salient poles

Abstract

An electric motor has a stator mechanically coupled to the rotor by a nutating traction interface, such that during nutation of the rotor with respect to the stator a tilt axis of the rotor progresses about the axis of rotation of the output shaft. The rotor and a surface of the stator bound a dynamic gap across which a magnetic field is produced by electrical activation of the motor to generate a force between the rotor and the stator. The traction interface and the gap are arranged such that, in a plane containing the axis of rotation of the output shaft, the traction interface is angled with respect to the stator surface bounding the gap. The rotor is connected to the output shaft by a tiltable connection such as a gimbal.

IPC Classes  ?

• H02K 41/06 - Rolling motors, i.e. motors having the rotor axis parallel to the stator axis and following a circular path as the rotor rolls around the inside or outside of the stator
• H02K 7/116 - Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
• H02K 41/00 - Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path