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.

The present disclosure provides a motor stator and a motor. The motor stator comprises a core; windings wound on the core; and a three-dimensional fitted winding inner groove embedding structure which is a cage-type structure having ribs and ends, the ribs being embedded in grooves between the windings, and the ends being connected to the ribs and cover ends of stator windings; both of the rib and the end of the inner groove embedding structure comprise nonmagnetic heat-conducting glue layers and a phase-change material layer interposed as an interlayer between the heat-conducting glue layers. According to the present disclosure, the heat of each part of the motor stator can be quickly conducted, so as to rapidly reduce the temperature, quickly eliminate the instantaneous temperature peak, and improve the temperature gradient equilibrium of each part.

An assembly including a winding and a cooler in contact with conductors of the winding, the cooler including a container forming a heat dissipator and including a phase change material having the ability to absorb a surplus quantity of heat when the conductors of the winding are subject to an increase in their current density and the heat dissipator is composed of at least two hollow parts separate and nestable with one another and intended to house the phase change material.

A representative cooling system for a nuclear reactor control rod drive mechanism (CRDM) includes an evaporation section located within or next to the CRDM and a condensation section fluidly coupled to the evaporation section. The cooling system includes a set of heat fins coupled to drive coils in the CRDM and heat pipes that extend through the drive coils and heat fins. A fluid evaporates while in the evaporation section of the heat pipes from heat generated by the CRDM and moves out of the evaporation section into the condensation section in the heat fins. The fluid cools and condensates while in the condensation section, recirculating back into the evaporation section. This passive natural circulation cooling system reduces or eliminates the number of water hoses, piping, and other water pumping equipment typically used for cooling a CRDM thereby increasing nuclear reactor reliability and simplifying nuclear reactor operation and maintenance.

A stator cooling assembly for a linear motor includes a stator and a modular cooling arrangement. The modular cooling arrangement comprises: a U-shaped fluid cooling pipe having first and second linear segments extending along first and second opposite longitudinal sides of the stator; an inlet and outlet port connected to a free end of the first and second linear segments, respectively, for circulating a cooling fluid; a central cooling arrangement comprising primary cooling units mounted into recesses of the stator; and connecting members connecting the central cooling arrangement to the fluid cooling pipe. Each primary cooling unit comprises a heat pipe having first and second portions extending along a recess of the stator and along a portion of the fluid cooling pipe, respectively. The connecting members connect the second portion of the heat pipe of each primary cooling unit to corresponding portions of the fluid cooling pipe.

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.

Various embodiments of the teachings herein include an electrical sheet for an electric machine, the electrical sheet comprises: two plates of a ferromagnetic material, the two plates arranged parallel to one another at a distance from one another forming an interior between the two; and a fluid in the interior. The two plates are connected to one another at respective edges circumferentially in a fluid-tight manner.

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.

The present disclosure provides a motor stator and a motor. The motor stator comprises a core; windings wound on the core; and a three-dimensional fitted winding inner groove embedding structure which is a cage-type structure having ribs and ends, the ribs being embedded in grooves between the windings, and the ends being connected to the ribs and cover ends of stator windings; both of the rib and the end of the inner groove embedding structure comprise nonmagnetic heat-conducting glue layers and a phase-change material layer interposed as an interlayer between the heat-conducting glue layers. According to the present disclosure, the heat of each part of the motor stator can be quickly conducted, so as to rapidly reduce the temperature, quickly eliminate the instantaneous temperature peak, and improve the temperature gradient equilibrium of each part.