Brushless DC electric motor
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United States of America Patent
Stats
-
Sep 26, 2006
Grant Date -
Jan 30, 2003
app pub date -
Jun 26, 2002
filing date -
Jun 26, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An electric motor comprises a housing, a magnetic rotor and a stator which comprises at least one circuit board. The magnetic rotor comprises a disk with circumferentially arrayed magnetic poles. The circuit board on each side comprises one layer of circumferentially arrayed coil windings arranged in pairs, thus each pair made as a spiral that extends from a center of a start coil winding to a center of an end coil winding with the same turn direction of the spiral in relation to each of centers. The layers are the same in transparent view and shifted angularly in such a way thus centers of the start coil windings from one side of the circuit board coincided and electrically connected by via's with centers of the end coil windings on the other side of the circuit board.
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