ELECTROMAGNETIC STEEL PLATE MOLDED BODY, AND ROTOR FORMED OF THE BODY, ROTATING EXCITATION FIELD TYPE SYNCHRONOUS MOTOR, AND VEHICLE MOUNTED WITH THE MOTOR

摘要

PROBLEM TO BE SOLVED: To enable high-speed revolution by raising the dynamic strength of a rotor core. SOLUTION: Retention holds 2 and 3 for retaining permanent magnets are formed in a rotor core steel plate 1 and polished so that the surface roughness of each inner end face 11A-11F of the magnet retaining holes may be 0.2μm or less in Ra. A rotor where the dynamic strength is enhanced without changing the performance of a motor can be provided, and the durability of the rotor can also be improved. COPYRIGHT: (C)2005,JPO&NCIPI