Method and apparatus for harmonics suppression in motor systems
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United States of America Patent
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-
Dec 16, 1986
Issued Date -
N/A
app pub date -
Mar 20, 1985
filing date -
Dec 4, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A polyphase synchronous motor having a relatively large number of poles, constructed for substantial elimination of all significant harmonics. Harmonics are eliminated by dividing the motor into two symmetrical groupings, each a complete motor, then rotating one grouping relative to the other by an angle .pi./h electrical degrees, where h is the order of the harmonic being suppressed. Also, with a permanent magnet disc rotor, the magnet poles on one face of the disc can be rotated relative to those of the other face in the same manner, to suppress a harmonic.
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