Electric motor with embedded permanent magnet, and refrigerating air conditioning equipment equipped with same
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United States of America Patent
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Mar 27, 2018
Issued Date -
N/A
app pub date -
Oct 29, 2013
filing date -
Oct 30, 2012
priority date (Note) -
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Abstract
A permanent magnet embedded electric motor includes a slit and a flux barrier. A hole defining portion of a magnet insertion hole includes an extended portion. The extended portion projects toward an interpolar core portion in a rotor core in an area positioned further on an outer side of a circumferential direction with respect to a width-direction end surface of a permanent magnet. (Lb) is larger than (La), and (Lc) is smaller than (Ld), where the (La) represents a distance between the slit and the core outer peripheral surface; the (Lb) represents a distance between the slit and an outer peripheral-side surface of the permanent magnet; the (Lc) represents a shortest distance between the extended portion and the interpolar core portion; and the (Ld) represents a thickness of the permanent magnet.
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