A rotary machine, in particular an electric machine, has a shaft, which extends in an axial direction and which has a cavity, and a heat pipe, in which a first thermal medium is arranged. The rotary machine is characterized in that the heat pipe is designed as an annular chamber, which surrounds the cavity. Improved cooling for the rotary machine is ensured by this arrangement.

A rotor for an electric machine having a rotor shaft, a winding support coupled to the rotor shaft in rotationally fixed manner, and at least one winding arranged on the winding support or a squirrel cage arranged on the winding support, wherein the rotor includes at least one heat pipe running at an angle to the rotor shaft.

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.

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.

A cooling device having a surface configured to allow the circulation of a heat-transfer fluid along the surface in a first direction D1, an exchange of heat being able to take place by convection between the cooling device and the fluid, the device includes n cooling fins, n being an integer greater than or equal to one, each cooling fin forming a protuberance of the device, extending primarily in a plane (P) containing the first direction (D1), in each fin, at least two inserts having a tube form and a dimension characteristic of a section of the tube and extending primarily in a second direction (D2) of the plane P distinct from the first direction (D1), the inserts having, over their greater length, a thermal resistance lower than the thermal resistance of the cooling fin along the same length, each insert being distant in the first direction (D1) from another insert by a length equal to or greater than the characteristic dimension of the section of the tube of the insert.

A vehicle wheel assembly comprises: a wheel for mounting a tire thereon; and an in-wheel motor mounted in the inner space of the wheel and comprising: a rotor connected to the wheel, wherein a magnet is mounted to a center portion of the rotor rotatably coupled with a bearing assembly and arranged at a rotation axis of the wheel, a stator configured to drive the rotor, a rotary sensor disposed in sensing relationship with the magnet mounted to the center portion of the rotor, the rotary sensor configured to be responsive to rotation of the magnet for generating a signal, and an electronic device comprising a circuit board and electronics; and a brake actuator configured to apply brake to the wheel or the rotor. The electronics mounted on the circuit board comprise a single electronic control unit configured to control both the in-wheel motor and the brake actuator.

A vehicle wheel assembly comprises a wheel for mounting a tire thereon and having an inner space; and an in-wheel motor mounted in the inner space of the wheel and comprising: a rotor connected to the wheel and configured to rotatable relative to a stator, the stator configured to drive the rotor, an electronic device comprising a circuit board and electronics mounted on the circuit board and configured to control the in-wheel motor, two-phase dielectric material, and covers coupled with the stator to form a hermetic enclosure. The electronic device and the two-phase dielectric material are contained in the hermetic enclosure formed by the wall of the stator and the covers coupled with stator, and the two-phase dielectric material is in contact with the wall of the stator and the electronic device to cool the stator and the electronic device by transitioning between a liquid phase and a gaseous phase, conduction, and convection.

The invention relates to an electrical machine (1) comprising a rotor (4) which is rotatably mounted around a rotation axis (5) extending in the axial direction (3) in bearing devices (16, 17), a stator (7) having two axial ends, an air gap between rotor and stator, an interior chamber (10) encompassing the stator (7) and rotor (4), a sleeve (11) encompassing a first part (111) which encloses the interior chamber (10), a frame (12) having a first (123) and a second (121) longitudinal support (123), a first (122) and a second (124) cross-support, and a dividing device (2) on the frame (12). The stator (7) comprises a fastening device (15) for connection to the frame (12) and the dividing device (2) can make the interior chamber accessible from the outside in a plane parallel to the frame (12). The invention further relates to a collection, to a frame (12), to a sleeve (11), or to a service or production method of such an electrical machine (1).

A superconducting magnet apparatus includes a plurality of superconducting magnet coil sections connected in series and housed within a cryogenically cooled, vacuum container. A power source generates a current. A first lead is electrically connected to the superconducting magnet coil sections. A second lead is enclosed entirely within the vacuum container. The second lead has a first section and a second section, and the first section is electrically connected to the power source. The second section is electrically connected to the first lead, and rigidly connected to a linear displacement device enclosed entirely within the vacuum container. The linear displacement device linearly displaces the second section relative to the first section, so that the first section contacts the second section thereby electrically connecting the first and second sections, or by creating a gap between the first section and second section thereby electrically disconnecting the first section from the second section.

A slotless electric motor provides a phase change material that may communicate thermally through the sides of coils directly attached to the outer circumference of the central stator. A control system modeling the motor allows effective operation for short durations.