Patent ID: 8250734
Filing Date: 2012-08-28
Classification: H02K,Y10T

Abstract:
1. A method of manufacturing a motor stator including: a stator core provided, in an inner surface thereof, with a plurality of slots and a plurality of teeth each radially inwardly extending and tapering toward the center of the stator core, the teeth including at least a first tooth, a second tooth, and a third tooth, and the slots and the teeth being arranged alternately; and a plurality of trapezoidal coils having the same shape, each of which is inserted in each slot, each coil being formed of a rectangular conductor that has a rectangular cross-section and is concentrated-wound into a trapezoidal shape, wherein the method comprises: individually mounting the coils on the second and third teeth located on both sides of the first tooth; elastically deforming one of the coils having an air core before it is mounted on the first tooth, and inserting a first part of the elastically deformed coil into the slot on one side of the first tooth; and inserting a second part of the elastically deformed coil into the slot on the other side of the first tooth while returning to an original shape by its elasticity resulting from elastic deformation.