Method and apparatus for improving performance of AC machines
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United States of America Patent
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Oct 1, 1991
Issued Date -
N/A
app pub date -
Sep 11, 1989
filing date -
Jul 22, 1986
priority date (Note) -
Expired
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Abstract
A method and apparatus for improving the performance of polyphase AC machines. The polyphase AC machines are excited both with a fundamental frequency and with an odd harmonic of the fundamental frequency. The odd harmonic flux wave is phase controlled so as to interact with otherwise waste harmonic flux waves generated by the rotor. The interaction of the harmonic flux waves enhances the pull-out torque, power factor, and efficiency of the polyphase AC machine.
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