| 摘要 |
A method of making a rotor for an electric motor includes accommodating, in a forming mold, a plurality of annularly disposed rotor magnets, a frame made of steel plate and formed generally into a shape of a cup, the frame having an annular wall disposed outside the annularly disposed rotor magnets so as to be located at a side opposed to a stator with respect to the rotor magnets, the annular wall having a open end, and a ring member made of a magnet material and disposed along the annular wall of the frame at an inner or outer circumferential side of the annular wall, the rotor magnets being held by magnet holding means provided in the forming mold in execution of the accommodating step, and pouring a molten resin into the forming mold accommodating the rotor magnets, the frame and the ring member and hardening the resin. |
