Patent ID: 7185413
Filing Date: 2007-03-06
Classification: H02K,Y10T

Abstract:
1. A method of manufacturing a motor having a ring-shaped motor core provided with a plurality of slots on an inner peripheral surface and coil groups of a plurality of phases, wherein the coil group in each of the phases is structured from a plurality of unipolar coils corresponding to one pole, each of the unipolar coils are inserted and disposed in the motor core by being passed through two of the plurality of slots so as to straddle the two of the plurality of slots, and the unipolar coils belonging to different phases of coil groups are overlapped with each other in portions of respective coil end portions when attached to the motor core, comprising: forming the unipolar coil, the unipolar coil having two coil inserting portions and having the coil end portions at two positions disposed in an outer portion of the motor core so as to connect the coil inserting portions, into a shape such that a size in a height direction parallel to the coil inserting portions changes so as to be larger in an inner peripheral side, corresponding to a diametrical direction of the motor core along a direction of a winding axis center, than an outer peripheral side by winding a wire a plurality of times; disposing the unipolar coil such that the two coil inserting portions in the unipolar coil respectively face toward inner peripheral opening portions of the two of the plurality of slots and are substantially parallel to an axial direction of the motor core; and inserting the two coil inserting portions of the unipolar coil into the two of the plurality of slots by moving the unipolar coil toward the motor core substantially linearly while holding the unipolar coil—so that protrusion dimensions at both ends of the unipolar coil protruding from both end surface positions in the axial direction of the motor core are maintained substantially the same.