Patent ID: 7786644
Filing Date: 2010-08-31
Classification: H02K

Abstract:
1. An electric rotary machine comprising: a yoke carrying thereon a plurality of permanent magnets; an armature core, fixedly supported on an armature shaft and rotatably disposed in the yoke, which has an outer periphery formed with a plurality of slots; a plurality of insulator-coated armature coils, wound in the slots of the armature core in multiple layers, each of which includes a flat type wire formed in lower and upper layer coils disposed in each of the slots in lower and upper layers; and a commutator fixedly supported on the armature shaft at one end thereof and having a plurality of conductor segments equidistantly disposed on an outer periphery of the armature shaft in a circumferential direction thereof, the conductor segments including risers, respectively, to each of which the lower and upper layer coils are electrically connected; wherein the lower and upper layer coils include a lower layer coil extension and an upper layer coil extension extracted from each of the slots of the armature core, respectively, and at least one of the lower and upper layer coil extensions includes a contour deformation part, formed in an area at an intersecting region where the lower layer coil extension and the upper layer coil extension intersect with each other, to create an insulating distance between the lower layer coil extension and the upper layer coil extension at the intersecting region thereof, the contour deformation part of the at least one of the lower and upper layer coil extensions includes a curvature portion formed in the area at the intersecting region where the lower layer coil extension and the upper layer coil extension intersect with each other, and the curvature portion includes a plastically deformed portion formed on the at least one of the lower and upper layer coil extensions in a curved shape.