Electric rotating machine
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United States of America Patent
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Sep 9, 2008
Grant Date -
Apr 26, 2007
app pub date -
Sep 5, 2006
filing date -
Sep 5, 2005
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An electric rotating machine which comprises: a magnet rotor which has a rotor yoke having a magnetic attachment surface extending in a peripheral direction, and multiple permanent magnets for constituting a magnetic field which are intermittently arranged in the peripheral direction of the rotor yoke and are attached on the magnetic attachment surface; and a stator in which armature coils are wound around an armature core having a magnetic pole portions opposed to magnetic poles of the magnet rotor, wherein a large number of grooves which extend in the peripheral direction of the rotor yoke are provided on the magnet attachment surface of the rotor yoke.
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