Brushless motor, brushless type fan motor and electric device comprising a brushless type fan motor
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United States of America Patent
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Nov 17, 2009
Grant Date -
Aug 2, 2007
app pub date -
Jan 8, 2007
filing date -
Jan 20, 2006
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In a fan motor, there are provided protruding portions provided integrally with a base member so as to face a magnet and protrude toward the magnet, and openings facing the magnet, in the base member made of magnetic material. As to the positional relation between the protruding portions and the openings, when the protruding portions are positioned corresponding to centers of the magnetic poles, the openings are positioned corresponding to boundaries between the magnetic poles. As to the positional relation between the protruding portions and the coils, when the protruding portions are positioned corresponding to centers of the magnetic poles, both ends of the coils are positioned corresponding to positions other than the boundaries between the magnetic poles.
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