An electrical rotating machine includes a laminated stator core having a first axial duct to convey a cooling air stream generated by a turbomachine through the laminated stator core to a rear stator winding overhang, and a second axial duct to return the cooling air stream from the rear stator winding overhang back through the laminated stator core. An air guide is attached to the laminated stator core on a side of the rear stator winding overhang to redirect the cooling air stream via the rear stator winding overhang. Radial slots between the ducts and an air gap between the laminated stator core and a rotor are spaced from one another at an axial distance which decreases toward a turbomachine-distal side of the laminated stator core so as to compensate a temperature gradient caused by the one-sided cooling.

An electric drive, particularly for vehicles, includes at least one first and at least one second electric machine. The electric machines are arranged relative to one another in a manner comparable to the cylinders of a conventional opposed-cylinder internal-combustion engine.

A rotary electric machine includes a stator including teeth around which coils are wound, a rotor including a shaft of a hollow shape and a core member around which field windings are wound, the core member being coaxially fixed to the shaft, the rotor being disposed coaxially with the stator with a gap provided radially between the rotor and the stator, and a coolant flow passage structure communicating with a pump that force-feeds a liquid coolant, in which the field windings include coil turns located at axial ends of the rotor, the coolant flow passage structure includes a first coolant flow passage communicating with the interior of the shaft, and the first coolant flow passage extends radially outward from the shaft, passing axially inside the coil turns, and has a discharge opening radially facing the stator at a radially outer end.

A cooling system for an electrical winding (14) includes a winding liner (100) that has at least one wall (102) that defines a plurality of channels (110) that are in communication with the winding (14). A coolant has a liquid state (112) and a gaseous state (114). The coolant passes through the channels (110) so that the coolant is in contact with at least a portion of the electrical winding (14). The coolant has a heat of evaporation such that at least a portion of the coolant evaporates as the coolant absorbs heat from the electrical winding (14). A delivery mechanism (200) delivers the coolant to the channels (110). A heat exchanger (212) cools the coolant after the coolant has passed through the channels (110) to condense the coolant into the liquid state.

A temperature estimation apparatus for a rotating electric machine includes a coolant dissipator, a heat dissipation amount calculator, a coolant temperature calculator, and a temperature calculator. The coolant dissipator is to cool down a coolant by heat exchange with a cooling air outside a rotating electric machine. The heat dissipation amount calculator is to calculate heat dissipation amount of the coolant in the coolant dissipator based on a physical quantity correlating with air speed of the cooling air and a physical quantity correlating with flow rate of the coolant. The coolant temperature calculator is to calculate, based on the heat dissipation amount, temperature of the coolant that has passed through the coolant dissipator. The temperature calculator is to calculate, based on the temperature of the coolant, temperature of the rotating electric machine which the coolant cool down.

A device for liquid cooling an electric motor having a rotor and a stator includes at least one cooling liquid applicator arranged to apply cooling liquid onto the stator. The cooling liquid applicator is moveably arranged relative to the stator so that the cooling liquid by means of movement of the cooling liquid applicator is applied onto different areas of the stator. A method for liquid cooling an electric motor and a platform that includes the device are also described.

Described herein are immersion-cooled axial flux electric motors and methods of operating thereof. An immersion-cooled axial flux electric motor comprises a rotor and an immersion-cooled stator. The rotor comprises a set of magnets and a magnet support plate extending perpendicular to the motor axis. The set of magnets is attached to the magnet support plate and distributed about on the motor axis. The immersion-cooled stator comprises a cooling-fluid inlet, a cooling-fluid outlet, a set of stator windings, and a stator-sealed space. The set of stator windings is positioned within the stator-sealed space proximate to the set of magnets such that during the operation of the motor magnetic flux between the set of stator windings and the set of magnets is aligned substantially parallel to the axis of rotation of the rotor. The cooling-fluid inlet and the cooling-fluid outlet are fluidically coupled to the stator-sealed space.

An electric supercharger includes an electric motor, a motor housing, a drive circuit, a circuit housing, and a compressing portion. The circuit housing includes an accommodating wall having a shape projecting from an outer surface of the motor housing, and a bottom located at a distal end in the projecting direction of the accommodating wall. The circuit housing together with the motor housing, hermetically confines the drive circuit. The bottom includes a heat release portion that faces the outer side of the circuit housing. The drive circuit is thermally coupled to an inner surface of the heat release portion that faces the inner side of circuit housing.

A remotely adjustable orifice plate arrangement for a generator is provided. The arrangement includes an enclosed generator with an interior wall including an orifice through which a fluid flows. The arrangement also includes a first plate including an orifice and a remotely controllable motor. The first plate is coupled to the interior wall within a flow area of the generator such that at least a portion of the orifice overlaps the orifice of the interior wall. The arrangement also includes an adjustable orifice plate including an orifice wherein the adjustable orifice plate slides relative to the first plate to determine the size of a resultant orifice of the interior wall. The motor selectively controls the slideable movement of the adjustable orifice plate relative to the first plate and is controlled remotely from outside the enclosed generator. A method to remotely adjust fluid flow within an enclosed generator is also provided.

A motor and a vehicle are provided. The motor has a housing, a stator, a first end cove, a second end cover, a first oil injection ring, a rotor, a first end plate, and a second end plate. The rotor includes a rotor core, a rotor oil path formed in the rotor core, a rotor magnet steel, a rotation shaft, and a rotation shaft oil path formed in the rotation shaft. A first oil groove is defined on an inner side surface of the first end plate opposite to the rotor core, and is in communication with the rotation shaft oil path and the rotor oil path, respectively. A first end plate oil outlet is defined in an outer side surface of the first end plate and communicates the first oil groove with an inner cavity of the housing.