Patent ID: 7692341

Claim:
Compact, high power, power conversion apparatus comprising: a rotor comprising a cylindrical casing, and a predetermined number of permanent magnets disposed on the casing, the rotor being adapted for rotation about the axis of the casing, a stator comprising a core and a plurality of sets of conductive windings, each set including a predetermined number of individual conductive windings and associated with an electrical phase; a respective collecting conductor associated with each set of conductive windings, each individual conductive winding of the set being electrically connected in parallel to the associated collecting conductor; and a coolant flow path directing coolant into contact with the stator windings; the respective collecting conductors being disposed in the coolant flow path electrically isolated from each other and spaced apart from each other and from the windings; wherein the collecting conductors each comprise a continuous conductive ring, each of the rings respectively having a different diameter; and wherein the respective conductive rings are disposed concentrically, axially displaced from each other.