A rotating device and a vacuum pump are provided, having a structure in which a refrigerant or the like does not leak out to an inside and which can sufficiently cool a rotating body, obtain high reliability, and realize cost reduction. The structure is constituted to include: a casing; a rotating body including a rotating shaft disposed rotatably relative to the casing, the rotating body constituted integrally with the rotating shaft; a hollow part formed along a center of the rotating shaft in the rotating body; and a cooling rod which is fixed to the casing and provided in a state of non-contact with the rotating body in the hollow part without having a mechanism for injecting a refrigerant, and which absorbs a radiation heat of the rotating body to cool the rotating body.

A motor includes a rotor that is rotatable about a central axis and a stator that radially opposes the rotor with a gap interposed therebetween. The stator includes a stator core that includes an annular core back surrounding the central axis and a tooth extending to a radially inner side from the core back, and a coil that is wound around the tooth. The stator core includes at least one hole penetrating in an axial direction of the central axis, and a slit including a space connecting the hole and a radially outer side of the stator core. A heat pipe is held in the hole and extends in an axial direction along the hole, and an adhesive is between the hole and the heat pipe.

A stator includes a stator core having a plurality of slots opening toward an inner surface and a plurality of teeth formed between the slots adjacent to each other; and flat angle coils wound around the teeth respectively. Each of the teeth includes a widened portion having a width in a circumferential direction of the inner surface, closer to the inner surface and the widened portion becomes wider, in a cross-sectional view taken along a cross section perpendicular to a rotational axis of a rotor surrounded by the stator core.

A stator and a motor including a stator. The stator includes a stator hub, a plurality of stator teeth extending from the stator hub that define a stator slot having a stator slot base, at least one winding disposed in the stator slot, and one or more oscillating heat pipes disposed at least partially in the at least one winding. The at least one winding is held apart from the stator slot base so that a cooling channel is defined between an inner winding portion of the at least one winding and a portion of the one or more oscillating heat pipes is disposed in the channel so cooling fluid can be passed between the stator slot base and the inner winding portion to cool the inner winding portion via at least operation of the one or more oscillating heat pipes.

A rotary mechanical system includes an electric machine, such as an electric motor, and a housing at least partially housing one or more components of the electric machine. The housing defines an electrical cavity and a coolant cavity. The electrical cavity houses one or more electrical components, such as a stator, of the electric machine. The coolant cavity is configured to receive a liquid coolant, such as ethylene glycol and water, from a liquid coolant system. The housing is configured to seal a two-phase refrigerant within the electrical cavity to transfer heat from the one or more electrical components to a wall of the electrical cavity and from the wall of the electrical cavity to the liquid coolant.

A rotor for an electric machine includes a heat pipe cooling system. A rotor core has a number of cavities internal to the rotor core. The cavities are surrounded by a wall defined by the rotor core. A magnetic element disposed in the at least one cavity leaving a void in the at least one cavity between the magnetic element and the wall. A heat pipe evaporator is disposed in the void and conforms to the available space, contacting the magnetic element and the wall to remove heat from the rotor core.

An electric machine includes a stator comprising a plurality of stator teeth, a winding disposed on each stator tooth of the plurality of stator teeth, a heat sink mounted in thermal contact with an end winding of each winding and comprising a plurality of microchannels, a heat-transfer fluid disposed within the plurality of microchannels, and a condenser configured to exchange heat with the heat sink.

The disclosed apparatus, system, and techniques described herein allow pole retention hardware of the electric motor to also function as a cooling manifold for removing heat generated by the electrical coils. A pole retainer apparatus can include a pole retainer for retaining a pole to a hub. The pole retainer can include a proximal end mounted on the hub and a distal end. The pole retainer can include a channel extending through the pole retainer from the proximal end of the pole retainer mounted on the hub to the distal end of the pole retainer. The apparatus can include a mount located at the distal end of the pole retainer and configured to retain the pole on the hub. The apparatus can include a fluid transfer duct connected to the mount. The cooling system can be employed on TORUS Axial Flux Permanent Magnet motors, and various other motor designs.

The present application relates to a generator comprising: a stator, a rotor, in particular having a rotor band, and a heat pipe assembly which is thermally connected to the rotor in order to conduct heat which is generated by the rotor, in particular during operation of the generator.

A stator and a motor including a stator. The stator includes a stator hub, a plurality of stator teeth extending from the stator hub that define a stator slot having a stator slot base, at least one winding disposed in the stator slot, and one or more oscillating heat pipes disposed at least partially in the at least one winding. The at least one winding is held apart from the stator slot base so that a cooling channel is defined between an inner winding portion of the at least one winding and a portion of the one or more oscillating heat pipes is disposed in the channel so cooling fluid can be passed between the stator slot base and the inner winding portion to cool the inner winding portion via at least operation of the one or more oscillating heat pipes.