An electric motor includes a stator including a stator core and a coil, a rotor, a first cylindrical wall, and a metal housing. A slot of the stator core includes a coil housing. The coil includes a coil end that protrudes in an axial direction from an axial end surface of the stator core. The first cylindrical wall is in contact with the axial end surface of the stator core. A second cylindrical wall of the housing is inserted into the first cylindrical wall. The housing demarcates a coil end cooling channel in which a cooling liquid to cool the coil end flows. The coil end cooling channel is located radially outward from the first cylindrical wall and the second cylindrical wall. An inner peripheral surface of a metal ring included in the first cylindrical wall is fitted to an outer peripheral surface of the second cylindrical wall.

An electric motor includes a cylindrical housing that houses a stator and a rotor. The housing includes a cooling liquid channel to allow a cooling liquid to flow between a first cooling liquid port and a second cooling liquid port. The cooling liquid channel includes a first annular channel and a second annular channel which respectively include a pair of coil ends therein, a first communication channel, and a second communication channel. A first end portion of the first communication channel is located adjacent to but separated from the first annular channel and communicates with the first cooling liquid port. A second end portion of the first communication channel communicates with the second annular channel. The second communication channel extends between the first and second annular channels so as to communicate the first and second annular channels with each other.

A rotating electrical machine includes a rotor and a magnet unit. The rotating electrical machine also includes a cylindrical stator and a housing. The stator is equipped with a stator winding made up of a plurality of phase windings. The stator is arranged coaxially with the rotor and faces the rotor. The housing has the rotor and the stator disposed therein. The rotor includes a cylindrical magnet retainer to which the magnet unit is secured and an intermediate portion which connects between a rotating shaft of the rotor and the magnet retainer and extends in a radial direction of the rotating shaft. A first region located radially inside an inner peripheral surface of a magnetic circuit component made up of the stator and the rotor is greater in volume than a second region between the inner peripheral surface of the magnetic circuit component and the housing in the radial direction.

The invention relates to an electric motor with an air-gap sleeve. The invention makes it possible for the first time to achieve improved heat dispersal from the rotor by means of an excess pressure in the inner region of the rotor of an air-gap sleeve electric motor. The excess pressure allows the wall thickness of the air-gap sleeve to be reduced by over 50%, as a result of which the heat transfer is improved and a gas with a high thermal capacity can be used.

The invention relates to an electric motor with an air-gap sleeve. The invention makes it possible for the first time to achieve improved heat dispersal from the rotor by means of an excess pressure in the inner region of the rotor of an air-gap sleeve electric motor. The excess pressure allows the wall thickness of the air-gap sleeve to be reduced by over 50%, as a result of which the heat transfer is improved and a gas with a high thermal capacity can be used.

Various embodiments of the teachings herein include a can for an electrical rotating machine and/or a liquid pump. The can may comprise a barrier layer including a barrier film and/or a barrier coating.

Various embodiments of the teachings herein include a can for an electrical rotating machine and/or a liquid pump. The can may comprise a barrier layer including a barrier film and/or a barrier coating.

An electric machine, including a rotor having a rotor shaft and a rotor laminated core, a stator having a stator laminated core with recesses and stator windings disposed in the recesses of the stator laminated core, wherein coolant can flow through the recesses such that the stator windings can be directly cooled by the coolant, wherein channels are configured in the stator laminated core at a distance to the recesses such that the stator windings can be indirectly cooled by the coolant flowing through the channels, and a device via which a flow of coolant through the recesses and through the channels can be set depending on an operating point of the electric machine such that, at first operating points, the coolant can be conducted only through the recesses and, at second operating points, the coolant can be conducted at least through the channels.

A hybrid module is provided that includes a water jacket and an oil reservoir. The water jacket can be configured to both directly provide a heat exchanger feature for a stator as well as the oil reservoir. Oil within the oil reservoir can be configured to be sprayed towards the stator at the same time that the water jacket is cooling the stator. This configuration provides an improved cooling effect for the stator.

A hybrid module is provided that includes a water jacket and an oil reservoir. The water jacket can be configured to both directly provide a heat exchanger feature for a stator as well as the oil reservoir. Oil within the oil reservoir can be configured to be sprayed towards the stator at the same time that the water jacket is cooling the stator. This configuration provides an improved cooling effect for the stator.