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|1. (WO2016056065) EMBEDDED-PERMANENT-MAGNET-TYPE ELECTRIC MOTOR, COMPRESSOR, AND REFRIGERATION AND AIR CONDITIONING APPARATUS|
|Applicants:||MITSUBISHI ELECTRIC CORPORATION
|Title:||EMBEDDED-PERMANENT-MAGNET-TYPE ELECTRIC MOTOR, COMPRESSOR, AND REFRIGERATION AND AIR CONDITIONING APPARATUS|
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.