Abstract: An electric machine includes a housing defining an axis and having a coolant port disposed in an axial center of the housing, and a cylindrical stator surrounded by the housing and having a stator body in the form of a plurality of stacked laminations, with the stator having opposite axial ends terminating in winding heads. The housing and/or the stator is constructed to have cooling channels which extend in an axial direction and communicate with the coolant port to allow a flow of coolant from the coolant port via the cooling channels to the winding heads, or in opposite direction from the winding heads via the cooling channels to the cooling port.

Abstract: An air-cooled electric rotary machine includes a stator with a stator core formed of laminations and having axial ends, which terminate in winding end portions, and a rotor, which is encircled by the stator with an air gap therebetween. Plural air channels, separated from one another, are formed in or at the stator core for allowing an air stream in complementary flow directions, wherein the air stream is generated by a single fan and deflected at the winding end portions in a looped air stream conduction.

Abstract: An electric machine, includes a stator with a laminated stator body having winding end portions potted in a cast, and a rotor for interaction with the stator. In order to cope with the increased heat development in the zone of the winding end portions compared to the zone of the stator body, the cast of the winding end portions is formed with surface-enlarging structures in heat-conducting contact with a cooling jacket or with a cooling medium, and/or the cast is provided at least partially with a heat-conducting envelope which carries off heat.

Abstract: In order to suppress virtually completely the cyclic power variation of a linear synchronous motor, the latter has the following features. At least one primary part (1) and at least one secondary part (6), which has a sequence of poles (10) formed by permanent magnets, and is also larger than the length of the primary part (1) in the movement direction (5). The primary part (1) has primary slots (9) which are suitable for receiving monophase or polyphase windings. Moreover, the primary part (1) has means for changing the magnetic force in the movement direction (5) of the linear motor in the region of the end piece (2) of the primary part (1). The end faces (14) of the end pieces (2) extend perpendicular to the movement direction (5) of the linear motor.

Abstract: An electric machine, includes a stator with a laminated stator body having winding end portions potted in a cast, and a rotor for interaction with the stator. In order to cope with the increased heat development in the zone of the winding end portions compared to the zone of the stator body, the cast of the winding end portions is formed with surface-enlarging structures in heat-conducting contact with a cooling jacket or with a cooling medium, and/or the cast is provided at least partially with a heat-conducting envelope which carries off heat.

Abstract: An air-cooled electric rotary machine includes a stator with a stator core formed of laminations and having axial ends, which terminate in winding end portions, and a rotor, which is encircled by the stator with an air gap therebetween. Plural air channels, separated from one another, are formed in or at the stator core for allowing an air stream in complementary flow directions, wherein the air stream is generated by a single fan and deflected at the winding end portions in a looped air stream conduction.