A rotor core manufacturing method, a rotor core manufactured by the manufacturing method, a rotor thereof, an embedded magnet type rotating electric machine having the rotor, and a vehicle, an elevator, and a processing machine using the rotating electric machine.

摘要

PPROBLEM TO BE SOLVED: To provide a method of manufacturing a rotor core which is easy to work and is inexpensive by increasing rotation speed while keeping low iron loss, and a rotor core which is manufactured by the manufacturing method, and a rotor, and an embedded magnet type dynamo-electric machine having the rotor. PSOLUTION: In the rotor for embedded magnet type dynamo-electric machines, which has magnet mounting holes 22 and 23 for mounting magnets inside the rotor core 21, the rotor core 21 is constituted of stacked steel plates, having hardenability, such as carbon steel or alloy steel, etc., and the bridge sections 24 and 25 around the magnet mounting holes 22 and 23 and the vicinity 26 and 27 of the bridge sections are quenched. PCOPYRIGHT: (C)2009,JPO&INPIT