Search International and National Patent Collections
|1. (WO2015045069) PERMANENT MAGNET EMBEDDED ELECTRIC MOTOR, COMPRESSOR, AND REFRIGERATING AND AIR-CONDITIONING DEVICE|
|Applicants:||MITSUBISHI ELECTRIC CORPORATION
|Title:||PERMANENT MAGNET EMBEDDED ELECTRIC MOTOR, COMPRESSOR, AND REFRIGERATING AND AIR-CONDITIONING DEVICE|
A permanent magnet embedded electric motor (1) is equipped with a stator (3) and a rotor (5). The rotor has a rotor core (11) constituted by laminating a plurality of sheet members. In the rotor core, a plurality of magnet insertion holes (21) are formed, into which corresponding permanent magnets (19) are inserted. The magnet insertion holes are each formed in a shape protruding toward the center side of the rotor. At least one slit (72) and at least one caulking (76) are formed in the rotor between the outer circumferential surface (25) of the rotor and the radial direction outside insertion hole contour surface (55) of the magnet insertion hole. At least a part of the caulking is positioned between a pair of the width extended lines (WE) of the slit.