A magnetic gear may include a stator, having a stator core having a plurality of teeth extending toward a rotation shaft and a plurality of coils wound around the plurality of teeth, a rotor, having a rotor core disposed inside the stator and fixed to the rotation shaft and a plurality of permanent magnets attached to the external surface of the rotor core, and a pole-piece unit, having a plurality of first pole pieces and a plurality of second pole pieces arranged radially about the rotation shaft between the stator core and the rotor core such that the plurality of first pole pieces and the plurality of second pole pieces are alternately arranged in a circumferential direction thereof.

Provided is a coil including first and second lead parts, and a winding part. The winding part includes first to n-th turns. The winding part includes first and second coil ends. The first lead part extends from the first turn to the n-th turn along an upper surface of the first coil end. The second lead part extends from the n-th turn. The first and second lead parts include respective ends that are equal in height from the upper surface of the first coil end when viewed from a radial direction, and are equidistant from the n-th turn when viewed from an axial direction.

A rotor including a shaft mounted around an axis of rotation; a laminated core mounted coaxially on the shaft, the laminated core extending between a front side face and a rear side face. It includes first internal cavities, a plurality of permanent magnets housed inside the first internal cavities, a front flange in the form of discs and arranged on either side of the laminated core. The shaft is provided with an internal inlet channel for circulating a coolant. The front or rear flange is configured to form, with the front or rear side face, at least one front outlet channel or rear outlet channel inside which a coolant is circulated. The front or rear outlet channel connected to the inlet channel opens at an outlet opening at the outer periphery of the front flange or rear flange.

A device has a housing and rotors rotatably coupled to the housing. Each rotor has a magnet on at least one side of the rotor. Printed circuit board (PCB) stators are located axially between the rotors and coupled to the housing. The PCB stators have layers, and each layer has coils. The number of rotors disks is equal to the number of stators plus one. The stators are interleaved with the rotors. A shaft is coupled to the rotors and the housing. The shaft has a hollow section coupled to a source of a liquid coolant through a rotary connector and to radial channels in the shaft that dispense a liquid coolant between the rotors and PCB stators. The shaft has flanges with different diameters configured to receive the rotors disks with respective matching bore diameters. In addition, the housing has a sump to collect the liquid coolant.

The present disclosure relates to a motor for a vehicle and a steering feedback actuator apparatus and a steering apparatus including the motor for a vehicle. The motor for a vehicle according to this embodiment may include: a motor housing; a motor shaft coupled with the motor housing to relatively rotate with respect to the motor housing; a dual rotor including an inner rotor and an outer rotor connected to the motor shaft; and a dual stator including an inner stator arranged on an inner side of the inner rotor and an outer stator arranged on an outer side of the outer rotor.

An axial flux motor is provided and includes a shaft, at least one rotor connected to the shaft, and a stator. The stator includes a stator core and an electrically conductive wire. The stator core is segmented and ring-shaped and includes a central opening through which the shaft extends to the at least one rotor. The stator core includes a hybrid segment. The hybrid segment includes soft magnetic composite material components and laminated layered blocks. The laminated layered blocks include two inclined laminated layered blocks, where a distance between the two inclined laminated layered blocks increases radially along a radially extending centerline of the hybrid segment. The electrically conductive wire wound on the hybrid segment.

A motor includes a shaft, a base, a stator, a rotor, a bearing, and at least one or more temperature adjusters. The shaft extends along a central axis extending in an axial direction. The base extends in a radial direction from an end of the shaft in an axially one direction. The stator has an annular shape surrounding the shaft, and is disposed further in an axially other direction than the base. The rotor is rotatable about the central axis. The bearing rotatably supports the rotor. The temperature adjuster adjusts an ambient temperature of the bearing. The shaft has a shaft hole recessed in the axial direction from an axial end of the shaft. The temperature adjuster is disposed in the shaft hole and overlaps at least a portion of the bearing as viewed in the radial direction.

A power tool including a housing, a motor having a rotor and a stator, at least one grip sensor configured to generate a grip parameter, and a switching network electrically coupled to the brushless DC motor. An electronic processor is connected to the switching network and the at least one grip sensor and configured to implement kickback control of the power tool. The electronic processor is configured to determine a kickback threshold based on the grip parameter, control the switching network to drive the motor, receive a signal related to a power tool characteristic, determine, based on the power tool characteristic being greater than or equal to the kickback threshold, that a kickback event of the power tool is occurring, and control, in response to determining that the kickback event is occurring, the switching network to cease driving of the motor.

The present invention may provide a motor comprising: a housing; a stator disposed inside the housing; a rotor disposed inside the stator; and a shaft coupled to the rotor. The housing includes a first housing and a second housing. The first housing includes a first side wall having a first radius and a second side wall having a second radius smaller than the first radius, and the second housing includes a third side wall contacting the first side wall and a fourth side wall contacting the second side wall. The outer surface of the first side wall includes a first coupling means, and the inner surface of the third side wall includes a second coupling means coupled to the first coupling means.

An electric lawnmower control system can include a battery, an electric motor configured to rotatably drive a blade, a fan rotatably driven by the electric motor, a printed circuit board, a motor controller, and a housing. The printed circuit board can be fastened to the battery and include a heat sink that is located adjacent to the fan. The motor controller can be mounted on the circuit board, in electrical communication with the battery and the electric motor, thermally coupled to the heat sink, and configured selectively drive the electric motor with electric power supplied by the battery. The housing can include a first side, a second side, and a ventilation passage extending from the first side to the second side. The ventilation passage can be in fluid communication with the fan, and at least a portion of the heat sink is exposed to air flowing through the ventilation passage.