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1. (WO2015045999) PERMANENT MAGNET EMBEDDED ELECTRIC MOTOR, COMPRESSOR, AND REFRIGERATING AND AIR-CONDITIONING DEVICE

Pub. No.:    WO/2015/045999    International Application No.:    PCT/JP2014/074635
Publication Date: Fri Apr 03 01:59:59 CEST 2015 International Filing Date: Fri Sep 19 01:59:59 CEST 2014
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 provided with a stator (3) and a rotor (5). The rotor (5) has a rotor core (11) constituted by laminating a plurality of sheet members. In the rotor core (11), a plurality of magnet insertion holes (21) are formed, into which corresponding permanent magnets (19) are inserted. At least one slit (72) and at least one caulking (76) are formed in the rotor (5) between the outer circumferential surface (25) of the rotor and the radial direction outside insertion hole contour surface (55) of the magnet insertion hole (21). At least a part of the caulking (76) is positioned between a pair of the width extended lines (WE) of the slit (72).