Electricity: motive power systems – Induction motor systems – Primary circuit control
Patent
1991-07-17
1993-08-17
Shoop, Jr., William M.
Electricity: motive power systems
Induction motor systems
Primary circuit control
318732, 318735, H02P 534
Patent
active
052372553
ABSTRACT:
An electric machine system includes a resonant switching system for selecting a resonant frequency of at least a portion of the circuit of the system. The electric machine system includes a first pair of windings for generating force to actuate a moving body and a second pair of windings for exciting the first pair of windings. The resonant switching system includes a resonant inductor and a resonant capacitor. The carrier signal used to excite one of the pairs of windings may have a frequency that is substantially equal to the resonant frequency of the circuit. Preferably, the air gap magnetic flux distribution for the pairs of windings are substantially alike. The electric machine system may employ a rotating body or alternatively may employ a linearly actuating body.
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Standard Handbook for Electrical Engineers, Archer E. Knowlton, 1949, McGraw Hill Book Company pp. 78-87 and 1722-1729.
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Soviet Patents Abstracts, Section EI, Week 36, Oct. 14, 1981.
Conference Record IEEE-IAS-1985 Annual Meeting, Oct. 6, 1985.
Cabeca John W.
Shoop Jr. William M.
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