Provided is a rotary electric machine that achieves high motor efficiency with little loss. This rotary electric machine is equipped with: a stator core arranged opposing the circumferential surface of a rotor, and in which multiple slots, wherein openings opening toward the rotor are formed, are formed in the circumferential direction; and coils inserted into the slots. A mixture of a soft magnetic powder and a resin material is formed in the openings of the slots, and the relative permeability of the mixture is 5-35.

Provided is a rotary electric machine that achieves high motor efficiency with little loss. This rotary electric machine is equipped with: a stator core arranged opposing the circumferential surface of a rotor, and in which multiple slots, wherein openings opening toward the rotor are formed, are formed in the circumferential direction; and coils inserted into the slots. A mixture of a soft magnetic powder and a resin material is formed in the openings of the slots, and the relative permeability of the mixture is 5-35.

A stator includes a cylindrical stator core provided with a plurality of slots, a segment conductor mounted to the stator core, and a resin insulator including a winding barrel portion and an insertion portion that are integrally molded. The segment conductor includes a plurality of leg portions inserted into the slots, and a crossover wire portion that couples two of the leg portions inserted into the slots that differ from each other. The winding barrel portion is disposed between the stator core and the crossover wire portion of the segment conductor. The insertion portion is disposed on an inner side from the segment conductor inside the slots of the stator core.

A stator includes a cylindrical stator core provided with a plurality of slots, a segment conductor mounted to the stator core, and a resin insulator including a winding barrel portion and an insertion portion that are integrally molded. The segment conductor includes a plurality of leg portions inserted into the slots, and a crossover wire portion that couples two of the leg portions inserted into the slots that differ from each other. The winding barrel portion is disposed between the stator core and the crossover wire portion of the segment conductor. The insertion portion is disposed on an inner side from the segment conductor inside the slots of the stator core.

In a rotor of a rotating electric machine, a slot includes a winding insertion portion and a widened portion. A width dimension of the widened portion is larger than a width dimension of the winding insertion portion. A pair of step portions are formed on both sides of an end portion of the winding insertion portion on the widened portion side. A wedge member is spaced from and opposed to the pair of step portions. An insulation includes: an insulation main body arranged between a rotor winding and a damper bar; and an extended portion, which is arranged in at least a part of a space between the wedge member and the pair of step portions, and is configured to suppress movement of the damper bar in a circumferential direction of a rotor core.

A stator for a radial-flux rotary electric machine includes a yoke with a plurality of teeth, each tooth extending from a root at the yoke to a tip. The stator further includes a plurality of coils, each one of which being located on a respective one of the plurality of teeth, the coils being sized such that a slot fill factor is between zero and unity to define axial voids in the slots. The stator further includes a plurality of magnetic sealing members, each one of which being engaged with the tips of adjacent teeth to circumferentially and axially seal the axial voids in the slots for retaining an axial flow of coolant therein, the magnetic sealing members being composed of a magnetic material to provide a flux path between adjacent tooth tips to increase an amount of leakage flux.

A stator for a radial-flux rotary electric machine includes a yoke with a plurality of teeth, each tooth extending from a root at the yoke to a tip. The stator further includes a plurality of coils, each one of which being located on a respective one of the plurality of teeth, the coils being sized such that a slot fill factor is between zero and unity to define axial voids in the slots. The stator further includes a plurality of magnetic sealing members, each one of which being engaged with the tips of adjacent teeth to circumferentially and axially seal the axial voids in the slots for retaining an axial flow of coolant therein, the magnetic sealing members being composed of a magnetic material to provide a flux path between adjacent tooth tips to increase an amount of leakage flux.

An electric machine may include an stator and a rotatable rotor. At least one of the stator or the rotor may include a plurality of multi-part trapezoidal teeth with an electromagnetic coil disposed around each tooth.

A liquid-cooled rotating electric machine may include an inner stator and outer rotor configured to rotate about the stator. A hub may be disposed within the inner stator and a heat exchanger may be disposed in the hub. The heat exchanger may be configured to enable the flow a liquid through it to dissipate heat from the stator.

A radial flux electric machine includes a rotor configured to rotate about an axis of rotation, a plurality of electromagnetic coils, and a stator. The stator may include an annular stator ring extending about the axis of rotation and a plurality of multi-part teeth circumferentially arranged on the stator ring. Each multi-part tooth of the plurality of multi-part teeth may include a core tooth-portion integrally formed with the stator ring and at least one additional tooth-portion separate from the stator ring. Each coil of the plurality of electromagnetic coils may be mounted on a different multi-part tooth of the plurality of multi-part teeth such that each coil surrounds a corresponding core tooth-portion of the multi-part tooth with a gap between the coil and the core tooth-portion. The at least one additional tooth-portion may be disposed in the gap.