Permanent magnet embedded rotor
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United States of America Patent
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Jun 7, 2016
Grant Date -
Feb 28, 2013
app pub date -
Mar 31, 2011
filing date -
May 13, 2010
priority date (Note) -
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Abstract
A permanent magnet embedded rotor disposed coaxially with a cylindrical stator having a plurality of coils in the circumferential direction includes a rotor core that includes a columnar body made of a magnetic metal and a spacer made of a nonmagnetic material, and has an even number of insertion grooves, a cylindrical body that is made of a nonmagnetic metal with good electrical conductivity and externally inserted on the rotor core, permanent magnets embedded in the insertion grooves so that their N poles and S poles alternately come into contact with the inner peripheral surface of the cylindrical body, and a rotary shaft made of stainless steel fit into a rotation center of the rotor core.
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