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1. (WO2015045069) PERMANENT MAGNET EMBEDDED ELECTRIC MOTOR, COMPRESSOR, AND REFRIGERATING AND AIR-CONDITIONING DEVICE

Pub. No.:    WO/2015/045069    International Application No.:    PCT/JP2013/076116
Publication Date: Fri Apr 03 01:59:59 CEST 2015 International Filing Date: Fri Sep 27 01:59:59 CEST 2013
IPC: H02K 1/22
Applicants: MITSUBISHI ELECTRIC CORPORATION
三菱電機株式会社
Inventors: TSUCHIDA, Kazuchika
土田 和慶
NIGO, Masahiro
仁吾 昌弘
BABA, Kazuhiko
馬場 和彦
ISHIKAWA, Atsushi
石川 淳史
OIKAWA, Tomoaki
及川 智明
Title: PERMANENT MAGNET EMBEDDED ELECTRIC MOTOR, COMPRESSOR, AND REFRIGERATING AND AIR-CONDITIONING DEVICE
Abstract:
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.