ELECTRIC MOTOR, ROTOR, COMPRESSOR, AND REFRIGERATION AIR CONDITIONING DEVICE

WIPO Patent Application WO/2017/072967

A1

This electric motor is provided with a stator, and a rotor arranged on the inward side of the stator. The rotor has a plurality of magnet insertion holes in the circumferential direction, and each magnet insertion hole has a rotor core corresponding to a one magnetic pole, and a plurality of permanent magnets provided such that at least two permanent magnets are arranged inside each magnet insertion hole. The rotor core has a first magnet holding section between adjacent permanent magnets inside the magnet insertion holes, and has a second magnet holding section at an end section of the magnet insertion holes in said circumferential direction. The rotor core is obtained by laminating a plurality of electromagnetic steel sheets in the axial direction. If the number of the plurality of electromagnetic sheets of the rotor core is expressed as A, and among the plurality of electromagnetic steel sheets of the rotor core, the number of electromagnetic sheets having the first magnet holding section is expressed as B, and the number of electromagnetic steel sheets having the second magnet holding section is expressed as C, the relationships of A>B and A>C are established.

NIGO MASAHIRO (JP)
TSUCHIDA KAZUCHIKA (JP)
KIJIMA RYUKICHI (JP)

PCT/JP2015/080803

May 04, 2017

October 30, 2015

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MITSUBISHI ELECTRIC CORP (JP)

H02K1/22; H02K1/27

WO2015147304A1	2015-10-01
WO2015019402A1	2015-02-12

JP2007181254A	2007-07-12
JP2010206882A	2010-09-16
JPH099537A	1997-01-10
JP2007159196A	2007-06-21

MAEDA Minoru et al. (JP)

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