An outer rotor motor includes a frame, a stator disposed on the frame, a coil disposed on the stator, a rotating shaft rotatably coupled to a central region of the frame, a cover coupled to the rotating shaft and surrounding the stator, and a magnet disposed on the cover and facing the stator. The cover may include a fan bracket projecting in a radial direction from a radially outer surface, and a plurality of blades extending in an axial direction from the radially outer surface.

A motor includes a rotor, a stator, a bearing, a motor housing, a bearing holder, a bus bar assembly, and a circuit board. The bearing holder holds the bearing to cover the opening of the motor housing, and includes a holder protrusion. The holder protrusion is located radially outside the motor housing and includes an axially penetrating terminal through hole. The bus bar assembly includes a bus bar terminal and a bus bar holder. The bus bar terminal is connected to the bus bar, extends axially downward, passes through the terminal through hole, and protrudes axially downward from the lower surface of the holder protrusion. The circuit board includes a circuit terminal extending axially downward, passing through the terminal through hole, protruding axially downward from the lower surface of the holder protrusion, and connected to the bus bar terminal.

An electrical machine includes a first stator having a stator core and a plurality of windings, and a movable element that is movably mounted adjacent to the first stator to form a first air gap between the movable element and the windings of the first stator. The movable element is a slider or a rotor connected to a shaft. A second stator includes a stator core arranged opposite to the first stator on the other side of the movable element. The movable element is movably mounted adjacent to the second stator to form a second air gap between the movable element and the stator core of the second stator. The first stator, the second stator and the movable element are arranged to pass the magnetic flux passes from the first stator through the first air gap, through the movable element and through the second air gap to the second stator.

Electric machine drive systems, and related electric machine embodiments, include technologies for providing redundancy of shaft information of one or more electric machines between converter controllers of the corresponding system. The converter controllers are configured to control operation of power converters, which control one or more electric machines. The disclosed technologies include establishing one or more communication buses between the converter controllers to share the shaft information, which may be based on analog signals from a single, common resolver and/or from different, redundant resolvers depending on the embodiment. For example, in some embodiments, converter controllers communicatively connected to the same resolver may include separate resolver-to-digital converters (RDCs) to provide redundancy of the RDCs.

The present invention may provide a motor including a housing, a stator disposed in the housing, a shaft disposed in the stator, a guide part in contact with an outer circumferential surface of the shaft, and a magnet coupled to the guide part, wherein the guide part includes a first guide disposed on a side surface of the shaft and a second guide extending from the first guide in an axial direction.

In an embodiment, a motor is disclosed, comprising: a housing; a cover disposed on top of the housing; a stator disposed inside the housing; a rotor disposed inside the stator; a shaft coupled to the rotor; and a connector disposed on top of the cover, wherein the connector comprises: a connector body; and a shield terminal disposed on the connector body so as to be partially exposed, wherein the cover is formed of a metal material, and wherein the shield terminal is inserted into a hole in the cover so as to come into contact therewith. Accordingly, by using the shield terminal including a curved surface and the hole formed in the cover, a gripping force of the motor can be improved.

The invention provides a motor for generating rotary power, the motor comprising: a stator for receiving electrical power; a rotor arranged coaxially with respect to the stator and having one or more magnets arranged thereon so that in response to the stator receiving the electrical power, the rotor is caused to rotate; the rotor comprising a rotor housing having an inner wall, the magnets being arranged around the housing, and wherein the inner wall has plural tortuous paths for the flow of coolant extending along the length of the rotor housing. Preferably, the motor has an output shaft arranged at least partially axially within the rotor housing; the inner wall being shaped for engagement with and so as to drive the output shaft.

The invention provides a power tool, a motor and a rotor thereof. The rotor includes a housing, a rotating shaft fixed on the housing, a yoke accommodated in the housing, and permanent magnets mounted on the yoke. The housing includes a bottom wall and a sidewall extending from an outer periphery of the bottom wall in an axial direction of the rotor. The rotor further includes a cooling fan, the cooling fan is located at an axial distal end of the sidewall away from the bottom wall. The rotating shaft, the yoke, the permanent magnets, the cooling fan and the housing are formed into a non-detachable whole by overmolding.

A dual drive unit may include two motors, two power transfer mechanisms, and two output shafts. The output shafts are co-linear. The dual drive unit may include two single drive units, which may be similar to each other, coupled together at a joint, which may optionally include a clutch. A drive unit may be modular, and various components may be combined to provide power to an output shaft. For example, a drive unit may include a differential at a first interface, which may be removable, and two drive units may be coupled together at the first interface. A drive unit may have a Z configuration, wherein a motor on a first side of a vehicle powers a wheel on an opposite side of the vehicle.

A high-lift shielded permanent magnet multistage water pump includes a pump shell, a motor assembly and an impeller. The motor assembly includes a motor barrel, a stator, a rotor and a rotor shaft. The pump shell is sleeved on an outside of motor barrel. An upper and a lower connection base for fixing the motor barrel is provided in the pump shell. A waterway cavity is formed between the pump shell and motor barrel. An upper and a lower impeller cavities are respectively formed at an upper and a lower ends of the pump shell. The lower impeller cavity, water passing cavity and upper impeller cavity are in sequential fluid communication. Both ends of the rotor shaft with an axel provided on pass through the upper and the lower connection bases respectively. The impeller is a multistage structure and mounted on the axle at both ends respectively.