A motor unit includes a motor including a rotor, a stator radially outside of the rotor; a housing for housing the motor; an oil passage for circulating the oil in the housing space; and a gear portion connected to a shaft of the rotor. The housing includes a motor housing portion defining a motor chamber in an interior, a gear housing portion defining a gear chamber in an interior, and a partition dividing the gear chamber and the motor chamber. The oil passage includes a flow passage arranged in an interior of the housing, and an oil feeding structure on an upper side of the motor to feed the oil to at least one of a stator core or coil ends. The flow passage includes a portion extending along an axial direction to feed the oil to the oil feeding structure. The partition includes the portion of the flow passage.

An electric motor assembly includes a primary electric motor including a primary rotor assembly and a primary stator assembly configured to be actuated to cause the primary rotor assembly to rotate based on an amount of magnetic flux in the rotor assembly. The assembly also includes a secondary electric motor including a secondary rotor assembly and a secondary stator assembly and a controllable magnetic device coupled to at least one of the primary rotor assembly and the secondary rotor assembly. The assembly also includes a controller configured to actuate the secondary electric motor based on a failure of the primary electric motor, and apply electric current to the controllable magnetic device to reduce back electromotive force (BEMF) caused by rotation of the primary rotor assembly during actuation of the secondary electric motor.

A drive device used in a head-up display device, the drive device being accommodated in a housing of the head-up display device and being fixed to the housing. The drive device includes a motor having a rotation shaft and a motor case having an end face through which the rotation shaft is protruded, a vibration suppressing member, and a frame provided with a first plate part having a through hole and a second plate part extended from the first plate part. The motor is fixed to the first plate part in a state that the rotation shaft is penetrated through the through hole and the end face is contacted with the first plate part, the vibration suppressing member is fixed to the first plate part or the motor case, and the second plate part is provided with a frame side fixed part which is to be fixed to the housing.

The purpose of the present invention is to provide an actuator that has a simple configuration and can stably achieve high output without the occurrence of magnetic saturation. This actuator has: a movable body provided with a cylindrical magnet section having alternately N-pole faces and S-pole faces on the peripheral surface surrounding a rotation shaft; and a fixed body provided with, pole tooth surfaces of the same number as the N-pole faces and the S-pole faces, and a coil that excites the pole tooth sections. The movable body has as a turning reference position a position at which the center of the pole tooth surfaces in the circumferential direction and the switching position of the pole faces of the magnet section face each other, and is held to the fixed body so as to be turnable back and forth around the rotation shaft in the circumferential direction.

The present disclosure relates to an axial flux motor comprising a stator and a rotor. The stator comprises a first motor coil, and a second motor coil, and the rotor comprises a first and second actuator magnet array configured in an alternating axial polarity arrangement and a first rotating magnetic return path member.

The present disclosure relates to an axial flux motor comprising a stator and a rotor. The stator comprises a first motor coil, a second motor coil, a first hall sensor, and a second hall sensor, and the rotor comprises a rotor platform member, an actuator magnet array arranged in an alternating axial polarity arrangement, a trigger magnet array, and a rotating magnetic return path member.

There is provided a cooling structure of a power transmission device 1 that the power transmission device includes a tubular input shaft 3 and an output shaft 4R that is inserted into and disposed inside the input shaft 3, and that the power transmission device delivers power output from an electric motor (drive source) 2 to the input shaft 3 to the output shaft 4R via a deceleration mechanism T and a differential device D, wherein the output shaft 4R is disposed such that the output shaft 4R is offset relative to a shaft center of the input shaft 3 in a radial direction, and an oil supply pipe 12 is disposed in an axial direction in a wide space that is formed on a side opposite to an offset side of the output shaft 4R in a space S between the output shaft 4R and the input shaft 3.

A stator of a polyphase claw pole motor includes: a compressed-powder member including a compression molded product of magnetic powder; and a metal member. At least claws of the claw pole of the stator are constituted by the compressed-powder member.

A rotor includes: a plurality of permanent magnets divided at regular intervals in a circumferential direction around a shaft, and provided in an axial direction; a first protection ring for positioning and holding ends in the axial direction of the permanent magnets; a second protection ring for positioning and holding other ends in the axial direction of the permanent magnets; and a protection cover covering outer circumferential surfaces of the permanent magnets, the first protection ring, and the second protection ring, and having a uniform thickness in a radial direction.

An IPM electric machine includes a rotor, rotor shaft stator, and permanent magnets. The rotor includes rare earth permanent magnets disposed within pockets. The rotor, the pockets and the permanent magnets conform to a first set of geometric design parameters. The stator includes radially-inwardly projecting teeth that form slots between pairs of the teeth. Electrical windings are disposed within slots of the laminate stack. The teeth and slots conform to a second set of geometric design parameters. The quantity of slots is between 60 and 96, the quantity of electrical poles is between 6 and 12, the quantity of electrical phases is between 3 and 6 and the electrical windings include a quantity of turns per phase that is between 8 and 20. A ratio of an outer diameter of the stator to an active length of the rotor is between 2 and 3.5.