Patent ID: 7246426
Filing Date: 2007-07-24
Classification: H02K,Y10T

Abstract:
1. A method of manufacturing a motor including a permanent magnet unit disposed at a circumference for providing a plurality of magnetic poles, a rotor disposed inside the circumference so as to be coaxial with the permanent magnet unit, said rotor including a center core disposed coaxially with the center axis of the rotor, a plurality of coil cores disposed at peripheral portions of the rotor, and a plurality of concentrated coils respectively mounted on the coil cores, said method comprising: punching corners of one end of the center core to form axially chamfered corners; holding all of said plurality of coil cores at one time by peripheral portions thereof so that outer peripheries of the held coil cores are on a prescribed circle, thereby defining an inner periphery; and moving the center core in the axial direction thereof to insert the same into the inner periphery of the held coil cores from the end of the center core where the chamfered corners are formed so that the center core can be completely fitted to the held coil cores.