An electric machine including a direct thermal contact end-winding microchannel heat exchanger is provided. A plurality of insulators are coupled to a stator. A plurality of windings are coupled to the plurality of insulators. A direct thermal contact end-winding microchannel heat exchanger is coupled to a section of the plurality of insulators that extends beyond the stator. The direct thermal contact end-winding microchannel heat exchanger is in direct thermal conduction with a section of the plurality of windings that extends beyond the first end to remove heat from the plurality of windings. According to other illustrative embodiments, a method and modular machine are provided.

An electromagnetic actuator for generating force is provided. The electromagnetic actuator includes a ferromagnetic body extending along a longitudinal axis, the ferromagnetic body comprising: a back-iron portion; and a pair of pole portions, extending from the back-iron portion, the back-iron portion connecting the pair of pole portions. The electromagnetic actuator further includes one or more magnetic-flux changing components at the pole portions, a respective magnetic-flux changing component located at a respective pole face, the respective magnetic-flux changing component configured to change magnetic flux density at a respective track-facing surface relative to the respective pole face. The electromagnetic actuator further includes electrical windings around the pole portions.

An electrical machine is described which comprises: a rotor; a plurality of stator units each extending only partway about a circumference of the rotor; wherein each stator unit is movably mounted to the rotor by a plurality of bearings such that the stator unit can move relative to the rotor in a radial and/or axial direction and wherein each stator unit is fixed in position in a circumferential direction; wherein the electrical machine comprises a magnetic system arranged such that rotation of the rotor generates an electric current in each stator unit and/or an electric current in each stator unit causes rotation of the rotor. A system comprising an electrical machine and a remote assembly and maintenance apparatus is also described, along with methods of assembling and disassembling an electrical machine.

Various embodiments of the teachings herein include an electric motor. An example includes: a stator with a plurality of bar-shaped field conductors; and an inverter with one or more parallel power components for controlling each of the field conductors, wherein the inverter comprises a controller to generate control signals for the power components. Power amplifiers are arranged on a plurality of circuit boards. The individual circuit boards are arranged on one or more cooling plates. The one or more cooling plates are arranged in mechanically active connection with the field conductors. A cooling device including a fluid line routed at least in part inside one of the field conductors.

The present disclosure relates to a stator assembly for an electrical machine. The stator assembly comprises a plurality of stator frames (110, 120, 130) forming a stator rim (100). The stator frames (110, 120, 130) defining ring sectors and mounted to each other to form a stator rim (100). Further, the stator frames (110, 120, 130) at least partially form an air distribution channel extending from at least one of the stator frames (110, 120, 130) into another of the stator frames (110, 120, 130). Methods (400) for assembling a stator assembly are also disclosed.

A motor unit may include an output shaft; an electric motor; a housing; a first battery receptacle disposed on the housing and configured to allow a first battery to be detachably attached thereto; a second battery receptacle disposed on a working unit and configured to allow a second battery to be detachably attached thereto; an adapter attachable to the first battery receptacle in place of the first battery; a cable extending from the adapter and configured to connect to either the second battery receptacle or the second battery; and a control circuit board. When the first battery is attached to the first battery receptacle, power may be supplied from the first battery to the electric motor. When the adapter is attached to the first battery receptacle and the second battery is attached to the second battery receptacle, power may be supplied from the second battery to the electric motor.

An electrical direct-drive generator that extracts rotational motion from wind or water is described. One or more modular stators overlap with a portion of a rotor. Each modular stator includes multiple stationary coils wound around magnetic cores. The number of modular stators can be increased to increase the desired output. The low-speed rotation of the rotor relative to the stationary modular stator generates electricity without the need for a gearbox and/or additional stages of power conversion. As a result, the electrical generator has reduced system weight, reduced volume, increased efficiency, increased reliability, reduced cost, and other advantages.

A vehicle drive device includes: a rotary electric machine including a rotor and a stator; a housing member forming a housing chamber that houses the rotary electric machine; a cover member connected to one end side of the housing member in an axial direction, facing the rotary electric machine in the axial direction, and including a bearing support portion that rotatably supports the rotor; a power switching element electrically connected to a coil of the stator; and a smoothing capacitor electrically connected to the power switching element. The smoothing capacitor is disposed on a radially outer side of the power switching element when viewed in the axial direction.

A motor includes, for example, a shaft, a magnet, a coil, a first bearing disposed at one end part side of the shaft in an axial direction, a second bearing disposed at the other end part side of the shaft in the axial direction, a cover fixed to the second bearing and disposed inside the coil in a radial direction, a holder fixed to the first bearing and an elastic member held by the holder. The elastic member is disposed between the cover and the holder in a longitudinal direction of the shaft.

Motors, pumps, generators, fluid-handling devices, and related systems or methods may include a motor assembly comprising a motor housing and a motor comprising a rotor and a stator contained in the motor housing. The motor further comprises an alternating current medium voltage synchronous motor.