An electromagnetic braking device includes a brake disk, a fixed disk, an armature, a biasing member for biasing the armature, and a stator for attracting the armature. In a stator magnetic circuit member, a first yoke, a permanent magnet, and a second yoke are arranged in this order from one end to the other end of a U shape. In a rotatable state or a rotation braking state, even when the coil energization is OFF, the rotatable state or the rotation braking state is maintained. When a current of a predetermined magnitude flows through the coil in a first direction in the rotatable state, the state shifts to the rotation braking state, and when a current of a predetermined magnitude flows through the coil in a second direction in the rotation braking state, the state shifts to the rotatable state.
F16D 59/02 - Self-acting brakes, e.g. coming into operation at a predetermined speed spring-loaded and adapted to be released by mechanical, fluid, or electromagnetic means
F16D 65/18 - Actuating mechanisms for brakesMeans for initiating operation at a predetermined position arranged in or on the brake adapted for drawing members together
H01F 7/122 - Guiding or setting position of armatures, e.g. retaining armatures in their end position by permanent magnet
H02K 7/102 - Structural association with clutches, brakes, gears, pulleys or mechanical starters with friction brakes
An electromagnetic braking device 1 according to the present invention comprises a brake disc 400, a fixed disc 500, an armature 300, a biasing member 200 that biases the armature, and a stator 100 that attracts the armature. A stator magnetic path member 105 has a U shape including a first yoke 110, a permanent magnet 130, and a second yoke 120 arranged in the stated order from one end to the other end of the U shape. In a rotatable state and a rotationally braked state, coil energization is turned off to maintain the rotatable state and the rotationally braked state, respectively. The present invention is configured to: shift to the rotationally braked state when a current of a predetermined magnitude in a first direction is caused to flow to a coil 150 in the rotatable state; and shift to the rotatable state when a current of a predetermined magnitude is caused to flow to the coil 150 in a second direction in the rotationally braked state. According to the present invention, the electromagnetic braking device 1 saves power while stably exerting a strong braking force.
A motor includes: a rotor having a permanent magnet and a stator having salient poles with coils. First to sixth salient pole groups each having n salient poles are arranged along a circumferential direction. The salient pole groups to which electric currents of the same phase are supplied are displaced from each other by 180 degrees in mechanical angle. Each salient pole has a straight shape. A coil group on the salient poles of each salient pole group is formed by connecting the n coils in series, winding directions of the coils of adjacent salient poles are opposite to each other, the coils are connected to each other at a distal or a proximal end side of the salient pole by a connecting wire between the adjacent salient poles, and the connecting wires have a reverse relationship with respect to the distal or the proximal end side between adjacent slots.
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
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 21/16 - Synchronous motors having permanent magnetsSynchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures having annular armature cores with salient poles
A motor 10 provided with a rotor 20 having a permanent magnet 24, and a stator 30 having salient poles 40 on which coils 50 are mounted, wherein: six salient pole groups from a first salient pole group to a sixth salient pole group each comprising n salient poles are arranged along the circumferential direction; salient pole groups to which current of the same phase is supplied are arranged so as to be positioned offset by 180° in terms of mechanical angle; each salient pole 40 is formed straight; each coil group mounted on the salient poles 40 of a salient pole group has n coils 50 connected in a straight line; the coils 50 are mounted on the salient poles in such a manner that the winding directions are the reverse of each other between adjacent salient poles, the coils 50 crossing over between the adjacent salient poles at the tip end side or the base end side of the salient pole 40 via a crossover 59, and when the crossover 59 in one slot is on the tip-end side or base-end side then the crossover 59 in a neighboring slot will be on the other of the tip-end or base-end side. A motor with which it is possible to output high torque with a relatively large number of poles, while achieving smaller size and lower weight.
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