Abstract: A thermal interface for discrete semiconductor devices (such as IGBT's) having a thermally conductive structure, a PCB populated with discrete electronic components, and each of the discrete semiconductor devices having a housing extending beyond the edge of the PCB and in a direction substantially parallel to a plane of the PCB, and a clamp bar secured to the thermally conductive structure adapted to compressively secure each housing to the thermally conductive structure and adapted to maintain thermal contact between a surface of each housing and the surface of the thermally conductive structure. A thermally conductive and electrically insulative pad is positioned between the semiconductor device housing and the thermally conductive structure. A casing enclosing the interface and PCB includes the thermally conductive structure formed on a backwall of the casing.

Abstract: A mass tuned damper for electric machines, particularly those with an external rotor and an internal stator in cantilever arrangement. The mass tuned damper includes a body with a predetermined mass and a mounting mechanism with a predetermined rigidity configured to couple the body onto a mounting surface of the stator. The mass tuned damper is configured, by varying the mass of body and/or the rigidity of the mounting mechanism, to oscillate at a first frequency equal to, but at least partially out of phase with, a resonance frequency of the stator.

Abstract: An electric machine is described herein. The electric machine includes a casing, a stator, a rotor generally coaxial with the stator, an enclosed cooling assembly circulating a first cooling fluid within the casing, and an open cooling assembly through which a second cooling assembly can flow; the open cooling assembly cooling both the stator and the first cooling fluid.

Abstract: A mass tuned damper for electric machines, particularly those with an external rotor and an internal stator in cantilever arrangement. The mass tuned damper includes a body with a predetermined mass and a mounting mechanism with a predetermined rigidity configured to couple the body onto a mounting surface of the stator. The mass tuned damper is configured, by varying the mass of body and/or the rigidity of the mounting mechanism, to oscillate at a first frequency equal to, but at least partially out of phase with, a resonance frequency of the stator.

Abstract: An embodiment of a liquid cooled electric machine is provided with an enclosed stator and includes a cooling assembly so configured as to allow cooling liquid to flow in the coil receiving slots of the enclosed stator to thereby cool the coils positioned therein.

Abstract: A thermal interface for discrete semiconductor devices (such as IGBT's) having a thermally conductive structure, a PCB populated with discrete electronic components, and each of the discrete semiconductor devices having a housing extending beyond the edge of the PCB and in a direction substantially parallel to a plane of the PCB, and a clamp bar secured to the thermally conductive structure adapted to compressively secure each housing to the thermally conductive structure and adapted to maintain thermal contact between a surface of each housing and the surface of the thermally conductive structure. A thermally conductive and electrically insulative pad is positioned between the semiconductor device housing and the thermally conductive structure. A casing enclosing the interface and PCB includes the thermally conductive structure formed on a backwall of the casing.

Abstract: The external rotor for an electric machine includes a cylindrically shaped receptacle having a peripheral wall and a magnet-receiving assembly including segments assembled to the inner surface of the peripheral wall so as to define a cylindrically shaped stack. The segments are shaped so as to yield magnet-receiving portions in the ring-shaped stack, and permanent magnets are secured to the magnet-receiving portion of the magnet receiving assembly.

Abstract: An electric machine is described herein. The electric machine includes a casing, a stator, a rotor generally coaxial with the stator, an enclosed cooling assembly circulating a first cooling fluid within the casing, and an open cooling assembly through which a second cooling assembly can flow; the open cooling assembly cooling both the stator and the first cooling fluid.

Abstract: An embodiment of a liquid cooled electric machine is provided with an enclosed stator and includes a cooling assembly so configured as to allow cooling liquid to flow in the coil receiving slots of the enclosed stator to thereby cool the coils positioned therein.

Abstract: A cooling arrangement cast into a generally cylindrical stator having longitudinal channels provided on an internal surface thereof is described herein. The cast cooling arrangement comprising a cast heat-storing element and conduits defining a cooling path having an inlet and an outlet.

Abstract: A cooling arrangement cast into a generally cylindrical stator having longitudinal channels provided on an internal surface thereof is described herein. The cast cooling arrangement comprising a cast heat-storing element and conduits defining a cooling path having an inlet and an outlet.

Abstract: The external rotor for an electric machine includes a cylindrically shaped receptacle having a peripheral wall and a magnet-receiving assembly including segments assembled to the inner surface of the peripheral wall so as to define a cylindrically shaped stack. The segments are shaped so as to yield magnet- receiving portions in the ring-shaped stack, and permanent magnets are secured to the magnet-receiving portion of the magnet receiving assembly.