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1. (WO2016056065) EMBEDDED-PERMANENT-MAGNET-TYPE ELECTRIC MOTOR, COMPRESSOR, AND REFRIGERATION AND AIR CONDITIONING APPARATUS

Pub. No.:    WO/2016/056065    International Application No.:    PCT/JP2014/076809
Publication Date: Fri Apr 15 01:59:59 CEST 2016 International Filing Date: Wed Oct 08 01:59:59 CEST 2014
IPC: H02K 1/27
F04B 39/00
F04C 29/00
Applicants: MITSUBISHI ELECTRIC CORPORATION
三菱電機株式会社
Inventors: BABA, Kazuhiko
馬場 和彦
NIGO, Masahiro
仁吾 昌弘
ISHIKAWA, Atsushi
石川 淳史
Title: EMBEDDED-PERMANENT-MAGNET-TYPE ELECTRIC MOTOR, COMPRESSOR, AND REFRIGERATION AND AIR CONDITIONING APPARATUS
Abstract:
In an embedded-permanent-magnet-type electric motor, a rotor core 2a of a rotor disposed on the radial inside of a stator is formed on the radial outside of a magnet insertion hole 2b and has a plurality of first slits 5a1-5a5 that communicate with the magnet insertion hole 2b, a plurality of second slits 5b1-5b5 that are formed in positions opposing the first slits 5a1-5a5 at a distance, interslit core parts 6a1-6a5 formed between the first slits 5a1-5a5 and second slits 5b1-5b5, outside core parts 6b1-6b5 formed between the second slits 5b1-5b5 and the outer peripheral surface 2A of the rotor core 2a, a space part 2e1 that communicates with the rotation direction end part of the magnet insertion hole 2b, and a thin core part 2a3 that is formed between the space part 2e1 and the outer peripheral surface 2A of the rotor core 2a and extends in the rotation direction.