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 cooling wheel (1) for actively cooling a stator (2) of an electric motor (3). The cooling wheel (1) can be fixed in a rotationally fixed manner adjacent to the stator (2) on a rotor (4) of the electric motor (3), which is rotatable about an axis of rotation (A). The cooling wheel has a bottom disc (10) that extends orthogonally to the axis of rotation (A) with an annular radially inner portion (12) and a radially outer portion annularly extending around it. The cooling wheel (1) has, in the axial direction adjacent to the radially outer portion of the bottom disc (10), a cover disc (30) that annularly extends around the axis of rotation (A). A plurality of blades (20) extend from the bottom disc (10) to the cover disc (30) and radially outwards. A flow channel is formed between two immediately adjacent blades (20) which is delimited by the two blades (20), a portion (11) of the bottom disc (10), located between the two blades and a portion (31) of the cover disc (30), located between the two blades (20). The respective portion (31) of the cover disc (30) is designed to be arcuate in the circumferential direction (U). The cover disc (30) has an undulating profile on its outer circumference (32).

A motor system includes: a motor including: a motor housing, a stator core, a stator winding, and a rotor core, the stator core mounted in the motor housing, the stator winding wound around the stator core, the rotor core rotatably disposed with respect to the stator core, a rotor flow path formed at least in the rotor core, the rotor flow path configured to transport coolant to the stator winding; and a valve configured to control a flow of the rotor flow path.

Increase in weight of a rotary electric machine including a low-speed rotor in which a spacer made of metal is provided between a plurality of magnetic pole pieces, can be suppressed. The rotary electric machine includes a stator, a first rotor provided so as to be rotatable with respect to the stator, and a second rotor provided coaxially with the first rotor. The first rotor includes a plurality of magnetic pole pieces disposed so as to be arranged in the circumferential direction, a plurality of spacers respectively disposed between the plurality of magnetic pole pieces, two dampers respectively disposed at both end portions in the axial direction, and a fastening tool for fastening each spacer to a corresponding clamper. The spacer has a cavity portion. The spacer and the fastening tool are electrically insulated from each other.

An electric motor comprises: a motor housing, a stator connected to the motor housing, wherein the stator comprises first stator end-windings and second stator end-windings, a rotor rotatable relative to the stator, a driveshaft connected to the rotor in a rotationally fixed manner, wherein the driveshaft is rotatably supported in the motor housing about an axis of rotation, wherein an axial cooling arrangement is arranged axially adjacent and radially overlapping one of the first and second stator end-windings, wherein the axial cooling arrangement comprises a fluid chamber with a plurality of nozzles distributed in circumferential direction and directed towards said one of the first and second stator end-windings.

An electric machine includes a stator assembly including a stator core defining at least one stator slot, a winding extending through the at least one stator slot, and a cooling assembly disposed around the stator. The cooling assembly includes a casing, a coolant supply in fluid communication with the casing, and a baffle defining one or more apertures, the baffle being disposed between the casing and the coolant supply and arranged to direct a liquid coolant from the coolant supply to the winding.

A motor includes: a motor housing, a stator core, a stator winding, and a rotor core, the stator core mounted in the motor housing, the stator winding wound around the stator core, the rotor core rotatably disposed with respect to the stator core, the rotor core having a rotor flow path to transport coolant to the stator winding, a stator flow path disposed in the motor and in communication with the stator winding; and a valve configured to control a flow of the rotor flow path. The rotor core includes a rotor flow channel inside. The motor includes a magnetic shield having a magnetic shield flow channel inside. A first end of the magnetic shield flow channel is configured to guide the coolant to the stator winding, and a second end of the magnetic shield flow channel is in communication with the rotor flow channel.

A linear electric machine includes a shaft and a piston assembly operably coupled with the shaft. The piston assembly includes a piston housing; and a piston arranged in the piston housing and partially defining each of an expansion chamber and a compression chamber within the piston housing. The piston includes a first portion in thermal contact with the compression chamber, a second portion in thermal contact with the expansion chamber, and a piston body extending from the first portion to the second portion. The piston body includes at least one heat shield configured to reduce heat transfer between the expansion chamber and the compression chamber. The at least one heat shield extends from an upper portion of the piston body to a lower portion of the piston body.

The rotating electric machine includes a stator having a stator core around which a plurality of coils are wound; a rotor supported to be rotatable relative to the stator with a predetermined gap therebetween; a rotor case that holds the rotor; and a first bearing and a second bearing that rotatably support the rotor case. The rotating electric machine includes: a first flow path formation body that forms a first flow path through which a refrigerant flows to a coil end part protruding from the stator core; a first case part which forms an accommodation space of the first bearing, is connected to the first flow path of the first flow path formation body, and fills the accommodation space with the refrigerant.

The present application discloses a novel heat dissipation mechanism for a beverage cooler and the beverage cooler itself. The heat dissipation mechanism comprises a driving heat dissipation box and a heat dissipation ventilation panel. The heat dissipation ventilation panel is provided with a driving heat dissipation area and a refrigerating heat dissipation area in a spaced-apart manner, wherein the driving heat dissipation area covers over the motor base of the beverage cooler, and the driving heat dissipation box is installed in the motor base; the driving heat dissipation area comprises a driving motor heat dissipation area and a driving board heat dissipation area, with the driving motor heat dissipation area being arranged in correspondence with a motor heat dissipation fan in the motor base; By adopting the present application, heat-generating areas of the beverage cooler can be cooled, achieving excellent heat dissipation effects.