A motor unit for use in an electric bicycle, the motor unit including a motor configured to drive a wheel of the electric bicycle in rotation. The motor unit includes a shell which at least partially houses the motor. The motor includes a rotary shaft, a rotor coupled to the rotary shaft to rotate along with the rotary shaft, and a stator arranged to surround the rotor. The stator is partially resin-molded and has a metallic surface exposed on an outer periphery thereof. A pin is interposed between the shell and the stator.

A pump-motor unit includes: a housing structure; an impeller for delivering a fluid; an electric drive motor accommodated in the motor space and including a rotor coupled to the impeller in order to rotationally drive it and a stator with a stator centring structure. The housing structure includes a pump space portion, a motor space portion, a housing centring portion axially between the pump space portion and the motor space portion, and a motor space opening on an end-facing side, through which the rotor and the stator can be axially inserted into the motor space. The housing centring portion encloses the stator centring structure in order to centre the stator.

The present invention provides a motor that comprises: a housing: a stator that is included in the housing and around which a coil is wound; a rotor coupled to the inside of the stator; a shaft coupled to the rotor; and a bus bar-terminal assembly that includes a bus bar that includes a connection terminal connected with the coil and a terminal connected with an external power supply and a body that includes the bus bar therein such that the connection terminal and the terminal protrude to the outside, wherein the bus bar-terminal assembly includes an alignment guide part provided on the outer circumferential surface of the body in the height direction and slide-coupled with the inner circumferential surface of the housing. Therefore, the present invention provides an advantageous effect of increasing the assembly efficiency of the motor and reducing the number of components thereof by configuring the terminal of the bus bar and the terminal-housing assembly as a single component and an advantageous effect of easily securing the alignment position by providing the alignment guide part on the outer circumferential surface of the bus bar-terminal assembly and installing a slot or rib at the inside of the housing to correspond to the alignment guide part.

A motor assembly for an e-boosting device is disclosed. The motor assembly includes a motor case and a motor cavity within the motor case. The motor case is configured to receive an electric motor that is configured to drivingly rotate a rotor about an axis of rotation. The motor assembly also includes a through-hole defined by the motor case. The motor case configured to be received in an outer housing to cooperatively define a coolant jacket with the outer housing. The coolant jacket includes a fluid flow path defined partly by the through-hole. Methods of manufacturing the motor assembly are also disclosed.

A motor includes a motor body part and a cap member. The motor body part includes a stationary unit, a rotary unit arranged to rotate about a center axis, and a bearing fixed to the stationary unit and arranged to rotatably support the rotary unit. The cap member includes a top surface portion extending perpendicularly to the center axis, a bottom surface portion disposed below the top surface portion and having a larger outer diameter than the top surface portion, and a connecting portion which connects the top surface portion and the bottom surface portion. The connecting portion includes a first connecting portion which connects an outer edge of the top surface portion and an outer edge of the bottom surface portion, and a second connecting portion which connects the outer edge of the top surface portion and an inner edge of the bottom surface portion.

The present invention relates to a slotless motor comprising a rotor position sensing element. The motor has a rotor having a rotational axis and a plurality of coil windings arranged into an integer N number of distinct blocks, each block being arranged about the rotational axis and having a gap between each adjacent pair of blocks. The rotor position element has a sensor ring having a sensor fixed to the sensor ring and a sensor ring attachment extending from the sensor ring wherein the sensors are spaced around the rotational axis and wherein the rotor position sensing element is configured to hold the sensor ring relative to at least one of the blocks such that the sensor is held in a predetermined position.

The present invention relates to a slotless motor comprising a rotor position sensing element. The motor has a rotor having a rotational axis and a plurality of coil windings arranged into an integer N number of distinct blocks, each block being arranged about the rotational axis and having a gap between each adjacent pair of blocks. The rotor position element has a sensor ring having a sensor fixed to the sensor ring and a sensor ring attachment extending from the sensor ring wherein the sensors are spaced around the rotational axis and wherein the rotor position sensing element is configured to hold the sensor ring relative to at least one of the blocks such that the sensor is held in a predetermined position.

A motor-driven compressor includes a metal housing accommodating a compression unit and an electric motor and a cover coupled to the housing. The cover and the housing define an accommodation chamber that accommodates a motor driving circuit that drives the electric motor. The cover includes a metal shield that blocks electromagnetic noise, a resin outer insulator that is fixed to an outer side of the shield and includes an outer circumferential portion, and a resin inner insulator that is fixed to an inner side of the shield and includes an outer circumferential portion. The shield, the outer insulator, and the inner insulator are separate from one another and stacked together. The shield is held between the outer insulator and the inner insulator. The outer circumferential portion of the outer insulator is joined to the outer circumferential portion of the inner insulator.

A motor-driven compressor includes a metal housing accommodating a compression unit and an electric motor and a cover coupled to the housing. The cover and the housing define an accommodation chamber that accommodates a motor driving circuit that drives the electric motor. The cover includes a metal shield that blocks electromagnetic noise, a resin outer insulator that is fixed to an outer side of the shield and includes an outer circumferential portion, and a resin inner insulator that is fixed to an inner side of the shield and includes an outer circumferential portion. The shield, the outer insulator, and the inner insulator are separate from one another and stacked together. The shield is held between the outer insulator and the inner insulator. The outer circumferential portion of the outer insulator is joined to the outer circumferential portion of the inner insulator.

A compressor includes a rotor configured to compress air and driven by a shaft. A motor is drives the shaft. The first and second journal bearings facilitate rotation of the shaft. The first journal bearing is upstream from the motor and the second journal bearing is downstream from the motor. The transfer tube is configured to provide cooling air from a bearing cooling air inlet to the first journal bearing. A method for cooling a compressor is also disclosed.