Permanent magnet type rotating electrical machine
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United States of America Patent
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Mar 31, 2015
Grant Date -
Aug 2, 2012
app pub date -
Jan 27, 2012
filing date -
Feb 2, 2011
priority date (Note) -
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Abstract
A permanent magnet type rotating electrical machine includes a rotor having a rotor core. Magnet holes circumferentially arranged at regular intervals in the rotor core include pairs of first magnet holes and pairs of second magnet holes. Each pair of first magnet holes are symmetric with respect to an imaginary line extending through a rotor core center. Each pair of second magnet holes are located on a radially inner side of the rotor core and are symmetric with respect to the imaginary line. Each pair of second magnet holes are located on an inner circumferential side of the paired first magnet holes with respect to a radial direction of the rotor core. A first magnet angle made by permanent magnets located in each pair of first magnet holes is larger than a second magnet angle made by permanent magnets located in each pair of second magnet holes.
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