Method and apparatus for improving performance of AC machines

Details Method and apparatus for improving performance of AC machines Method and apparatus for improving performance of AC machines

1989-09-11

1991-10-01

Shoop, Jr., William M.

Electricity: motive power systems

Synchronous motor systems

Synchronization systems

318718, 318439, H02P 500

Patent

active

050536893

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.

REFERENCES:
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patent: 4088934 (1978-04-01), D'Atre et al.
patent: 4225914 (1980-09-01), Hirata et al.
patent: 4243927 (1981-01-01), D'Atre
patent: 4442393 (1984-04-01), Abbondanti
patent: 4573003 (1986-02-01), Lpu
patent: 4736147 (1988-04-01), Shizbarg

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