Patent ID: 6370761
Filing Date: 2002-04-16
Classification: H02K,Y10T

Abstract:
A method of making a rotor for an electric motor including a stator, the method comprising steps of:holding, on an intermediate mold, a plurality of annularly disposed rotor magnets, a frame made of steel plate and formed generally into a shape of a bottomed short cylinder, the frame having a disc-like main plate and a short cylindrical annular wall disposed outside the annularly disposed rotor magnets so as to be located at a side opposed to the stator with respect to the rotor magnets, the annular wall having an open end, and a ring member made of a magnetic material and disposed along the annular wall of the frame at an inner or outer circumferential side of the annular wall; accommodating the rotor magnets, the frame and the ring member held on the intermediate mold into a forming mold; and pouring a molten resin into the forming mold accommodating the rotor magnets, the frame and the ring member and hardening the resin.