A motor is contained in a motor container space. A controller is contained in a controller container space. The motor container space and the controller container space are arranged in series in a direction of a rotation axis of a motor shaft, while interposing a partition wall therebetween. The motor shaft is inserted in a motor shaft through-hole of the partition wall. A magnet is disposed at an end of the motor shaft, in the controller container space. A rotation sensor is disposed in the controller container space oppositely to the magnet, for monitoring a rotational position of the motor shaft on the basis of variation in magnetic field due to rotation of the magnet. A cover made of nonmagnetic metal is disposed between the magnet and the rotation sensor so as to cover the motor shaft through-hole.

The purpose of the present invention is to obtain a structure with which it is possible to improve the heat dissipation performance and efficiency of an axial gap dynamo-electric machine. Accordingly, the present invention is an axial gap dynamo-electric machine of such construction that a disc-shaped rotor in which permanent magnets are disposed is provided in the axial direction and a stator is disposed in the axial-direction center portion, wherein the outer circumferential side of a stator winding is in intimate contact with the inside diameter of a housing, embedding with a mold resin is used for the housing and a stator core and for a stator coil and the housing so that a connection is established with the housing, and the housing comprises a nonmagnetic, electrically nonconductive material.

A brushless motor has a rotor assembly including a shaft, an impeller, a bearing assembly and a rotor core. The brushless motor has a stator assembly and a frame having an outer portion and an inner portion radially inward of the outer portion. The inner portion supports at least one of the rotor assembly and the stator assembly. The brushless motor has a strut extending between the outer portion and the inner portion. The strut extends at least partially into a recess formed in the stator assembly.

A wedge for use in an electric machine includes a central portion comprising at least a first material, a first wing integrally attached to the central portion, and a second wing integrally attached to the central portion opposite the first wing, wherein the first wing, and the second wing include a second material.

An electric machine includes a housing, a stator assembly within the housing, a rotor assembly within the housing, and a dam assembly including a first dam element. The first dam element is arranged on one end of the electric machine. The first darn element includes an air inlet. The air inlet is configured to receive a supply of pressurized air.

A wedge for use in an electric machine includes a central portion comprising at least a first material, a first wing integrally attached to the central portion, and a second wing integrally attached to the central portion opposite the first wing, wherein the first wing, and the second wing include a second material.

A cryogen-free partially-superconducting electric machine of the wound field synchronous type includes a room temperature semi-slotless stator, a superconducting motor rotor, a gap between the rotor and stator, a torque tube which isolates the cryogenic superconducting motor rotor from a central shaft, bearings, an acoustic cryocooler integrated within the motor rotor and torque tube, a heat exchange, a rotary transformer, a vacuum pump, a vacuum enclosure integrated with the stator, and an eddy current/thermal shield. The electric machine can act as a motor or a generator and produces a high specific power and efficiency.

An electric rotating machine according to an embodiment includes a stator element, a rotor element, and a housing. The rotor element is rotatable about a rotation axis. The housing houses the stator element and the rotor element, and is provided with an electric insulating portion on a part of or whole of an inner surface including a surface facing at least one of the stator element and the rotor element.

A rotor for an electrical machine is provided. The rotor comprises: a rotor body; one or more magnets arranged around the rotor body; and a non-magnetic containment sleeve positioned radially outwardly of the one or more magnets. The containment sleeve has axially-alternating solid ring sections and reticulated ring sections.

An electric motor includes: a stator; a shaft; a rotor mounted on the shaft, the rotor having an end ring that is concentric with the shaft; and a flux shield around the shaft inside the end ring.