In a rotary electric machine, first inclined surfaces that intersect a plane that includes a central axis of a shaft at a predetermined angle are disposed radially outside gaps between coil ends of circumferentially adjacent concentrated winding coils, and cooling air that is blown out from a cooling fan and has flowed radially outward through the gaps between the coil ends is converted into an axially outward flow by the first inclined surfaces.

In a rotary electric machine, first inclined surfaces that intersect a plane that includes a central axis of a shaft at a predetermined angle are disposed radially outside gaps between coil ends of circumferentially adjacent concentrated winding coils, and cooling air that is blown out from a cooling fan and has flowed radially outward through the gaps between the coil ends is converted into an axially outward flow by the first inclined surfaces.

A rotor element or a star disk which is designed to be arranged on an electrically excited rotor of an electric machine, includes a base which is designed to be arranged in an insert between the axial end of a laminate stack of the rotor and at least one end winding of the rotor. At least one fin is fastened on the base and is designed to protrude in the insert through the at least one end winding axially out of the at least one end winding.

A rotor element or a star disk which is designed to be arranged on an electrically excited rotor of an electric machine, includes a base which is designed to be arranged in an insert between the axial end of a laminate stack of the rotor and at least one end winding of the rotor. At least one fin is fastened on the base and is designed to protrude in the insert through the at least one end winding axially out of the at least one end winding.

A compressor system (1) includes a motor including a rotor (31) that rotates and a stator (32), a compressor configured to compress a working fluid by rotating together with the rotor (31), a heat exchanger (61) configured to cool a cooling medium that has circulated inside the stator (32) or in a gap (33) between the stator (32) and the rotor (31), and a cooling flow path (64) through which the cooling medium is supplied to the heat exchanger (61) and the cooling medium cooled by the heat exchanger (61) is circulated again inside the stator (32) or in the gap (33) between the stator (32) and the rotor (31).

A rotor includes: a tubular retaining ring opened on an outer side thereof in an axial direction and covering a coil end portion of each of coils; and rotor baffles and insulation baffles alternately connected in a circumferential direction and partitioning a space in the retaining ring into a first space and a second space, the first space is formed over an entire circumference around a shaft, each rotor baffle includes, at a part thereof on a radially outer side of which a jumper portion is present, a first tapered shape part tilted so as to be more apart from the jumper portion toward a center side in the axial direction of the rotor.

A rotor includes: a tubular retaining ring opened on an outer side thereof in an axial direction and covering a coil end portion of each of coils; and rotor baffles and insulation baffles alternately connected in a circumferential direction and partitioning a space in the retaining ring into a first space and a second space, the first space is formed over an entire circumference around a shaft, each rotor baffle includes, at a part thereof on a radially outer side of which a jumper portion is present, a first tapered shape part tilted so as to be more apart from the jumper portion toward a center side in the axial direction of the rotor.

A rotor assembly for use with an electric machine assembly includes a plurality of magnets and a rotor frame having a pair of opposing end plates and a plurality of circumferentially spaced longitudinal members extending between the opposing end plates. The opposing end plates and the plurality of longitudinal members combine to define a plurality of openings that are each configured to receive a magnet of the plurality of magnets. At least one of the opposing end plates includes a plurality of fins extending therefrom in a direction opposite the longitudinal members.

A stator for an electric motor includes a substantially hollow-cylindrical stator stack provided with wire windings and an end winding, which adjoins the stator stack in the axial direction. The stator stack includes a number of slots, wherein a coolant line is inserted into the respective slot. To improve efficiency of the electric motor, a section of the respective coolant line extends into the region of the end winding.

A turbine generator of the reverse-flow type having a rotor winding and a stator winding and a cooling duct, wherein the cooling duct is designed as a diffuser. The diffuser is designed such that a device is arranged on an internal cooling duct wall, which device prevents the flow of the cooling medium from stalling, leading to an improved, more uniform flow to a cooling apparatus.