A rotating heat pipe is used for temperature control of electric motors and generators and other rotating heat generating assemblies to ensure their proper operation. The heat pipe is integral with the shaft, and unlike conventional devices, incorporates a solid-liquid phase change material as the heat transfer/transport material. In addition, it comprises a scraped surface heat exchange mechanism at the heat dissipation region to allow for high cooling rates as required. This scraped surface mechanism is preferentially driven by a magnetic coupling to eliminate issues related to leaks of the heat transfer material.

An enclosure for an optoelectronic sensor. The enclosure includes a thermodynamically open first chamber; a thermodynamically closed second chamber; and a rotor extending from the first chamber into the second chamber. The rotor includes a shaft part in the second chamber coaxial to the rotational axis of the rotor. The shaft part mounts an optoelectronic sensor device. The rotor includes a head part in the first chamber coaxial to the rotational axis of the rotor. A heat dissipation fan is fixedly arranged on and surrounds the head part. The head part and the fan are rotatably and thermally coupled to the shaft part to rotate simultaneously with the shaft part. The rotor transfers heat over the shaft part from the second chamber to the head part and the fan dissipates the transferred heat to an environment.

A motor includes a rotor rotatable about a central axis and a stator including coils. The stator opposes the rotor with a gap interposed therebetween. A housing defines at least a portion of a closed chamber in which a cooling medium is housed. Heat dissipation portions are able to release heat of the cooling medium in the closed chamber to an outside. A pressure adjustment portion is able to adjust a pressure in the closed chamber. At least a portion of the coils and the rotor is housed in the closed chamber.

Stator, in particular a stator manufactured from punch bundled dynamo sheets, for an external rotor and/or an internal rotor motor of an electric machine, comprising a stator yoke, a plurality of stator teeth, as well as in each case one stator groove lying between two stator teeth, wherein at least one heat conducting pipe for cooling the stator is in each case incorporated in the stator groove.

A stator assembly and a center disk spindle double-rotor motor, includes a stator carrier and a winding core body; a through slot is formed in an end surface of the stator carrier in a penetrating manner; and the winding core body is arranged in the through slot. The center disk spindle double-rotor motor includes a transmission shaft, a stator assembly and rotor assemblies; the stator assembly is arranged on the transmission shaft; the transmission shaft can rotate relative to the stator assembly; the transmission shaft is fixedly provided with the rotor assemblies on two sides of the stator assembly. The whole center disk spindle double-rotor motor uses a double-rotor structure; and by means of the stator assembly of a specific structure, and in combination with the rotor assembly, the motor has beneficial effects of high efficiency, high power, large torque, low loss, light mass, good heat dissipation and the like.

Aircraft electric motors are described. The aircraft electric motors include a motor unit having a rotor and a stator, wherein the stator includes a plurality of windings and cooling channels arranged to provide cooling to the plurality of windings, a drive unit configured to drive operation of the motor unit, and a cooling system. The cooling system includes an oscillating heat pipe containing a first working fluid, wherein the oscillating heat pipe is arranged to pick up heat from at least one winding, the oscillating heat pipe having an evaporator section arranged in thermal contact with the at least one winding and a condenser section arranged away from the evaporator section and a heat pickup portion arranged to receive a second working fluid to remove heat from the condenser section of the oscillating heat pipe.

An electric propulsion system for an aircraft includes a nacelle and an electric machine. The electric machine includes a stator positioned in the nacelle, and a rotor and fan assembly positioned in a primary flow path through the nacelle. The rotor and fan assembly includes a cylindrical fan shroud, a plurality of rotor magnets positioned on an outer surface of the fan shroud, and a fan hub mounted on a central support shaft via one or more bearings. A plurality of fan blades extend between an inner surface of the fan shroud and an outer surface of the fan hub. The rotor magnets may be loaded in compression in a radial direction when the rotor and fan assembly is at rest. The fan blades may be pre-stressed in a radial direction when the rotor and fan assembly is at rest.

A stator of an external rotor motor supports a plurality of excitation windings. At least one heat dissipation means is provided, for discharging heat in an axial direction. The heat dissipation means contacts the end face of at least one excitation winding or a potting compound or insulation enclosing the excitation winding and is also connected to a heat sink, in the form of the stator carrier, a cooling element and/or a housing, for removing the heat.

An integrated motor linear actuator system includes one or more stator stages inside a housing. The stator stages have a winding and a stator core disposed about a common longitudinal axis, with a plurality of stator teeth configured to guide magnetic flux generated by the winding. A rotor is disposed along the longitudinal axis, within the stator stages, with a plurality of magnetic poles distributed circumferentially about the outer surface, adjacent the stator teeth, so that the stator stages are configured to drive the rotor into rotational motion about the longitudinal axis via the magnetic flux. A thrust tube and screw assembly are operationally coupled to the rotor, and configured to convert the rotational motion into linear motion of the thrust tube.

A heat pipe assembly includes walls having porous wick linings, an insulating layer coupled with at least one of the walls, and an interior chamber sealed by the walls. The linings hold a liquid phase of a working fluid in the interior chamber. The insulating layer is directly against a conductive component of an electromagnetic power conversion device such that heat from the conductive component vaporizes the working fluid in the porous wick lining of the at least one wall and the working fluid condenses at or within the porous wick lining of at least one other wall to cool the conductive component of the electromagnetic power conversion device. The assembly can be placed in direct contact with the device while the device is operating and/or experiencing time-varying magnetic fields that cause the device to operate.