Permanent magnet embedded electric motor, compressor, and refrigerating and air-conditioning device
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United States of America Patent
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Jan 23, 2018
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N/A
app pub date -
Sep 18, 2014
filing date -
Sep 26, 2013
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Abstract
An interior permanent magnet motor includes a stator and a rotor. The rotor includes a rotor core formed by laminating a plurality of plate members. The rotor core has a plurality of magnet insertion holes formed therein, into which corresponding permanent magnets are respectively inserted. At least one slit and at least one caulked portion are formed between a rotor outer peripheral surface of the rotor and a radially-outer insertion hole contour surface of the magnet insertion hole. At least a part of the caulked portion is positioned between a pair of width extended lines of the slit.
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