Patent ID: 7804217
Filing Date: 2010-09-28
Classification: H02K,Y10T

Abstract:
1. A rotary electric machine for rotating an armature based on a magnetic field, the rotary electric machine comprising: a yoke having a circumferential surface and a pole core mounted on the circumferential surface, the pole core having an outer periphery, the outer periphery having at least one rounded corner; a field coil member working to produce a magnetic field when energized, the field coil member being composed of a rectangular wire strap, the rectangular wire strap having a pair of opposing major sides and a thickness therebetween substantially less than a width of the major sides, the rectangular wire strap being wound edgewise into the field coil member, the field coil member comprising: an edgewise coil composed of a plurality of coaxially layered convolutions, the plurality of coaxially layered convolutions being wound around the outer periphery of the pole core, the edgewise coil having one coil end, the one coil end of the edgewise coil extending from a start point on the at least one rounded corner of the pole core in a direction parallel to a tangential direction of the start point of the one rounded corner, the extending direction of the one coil end of the edgewise coil being tilted from an axial direction of the yoke.