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 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 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.

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.

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.

An energy conversion device includes a set of nozzles passing through the body of a shaft and configured to form an oil mist in the cavity under the effect of the rotation of the shaft in a range of rotational speeds, from a proportion of oil injected into the shaft, to cool a rotor module and a stator module, a duct secured to the shaft and comprising an inlet communicating with the internal volume so as to receive, under the effect of the rotation of the shaft, oil injected into the internal volume, the duct leading the other proportion of the oil as far as an outlet of the duct, a removal device for removing the oil leaving the duct to an oil reservoir without contributing to the oil mist.

An energy conversion device includes a set of nozzles passing through the body of a shaft and configured to form an oil mist in the cavity under the effect of the rotation of the shaft in a range of rotational speeds, from a proportion of oil injected into the shaft, to cool a rotor module and a stator module, a duct secured to the shaft and comprising an inlet communicating with the internal volume so as to receive, under the effect of the rotation of the shaft, oil injected into the internal volume, the duct leading the other proportion of the oil as far as an outlet of the duct, a removal device for removing the oil leaving the duct to an oil reservoir without contributing to the oil mist.