Electric power conversion systems – Cascaded or combined – diverse conversions in which the... – Current and frequency
Patent
1977-11-15
1981-03-10
Miller, J. D.
Electric power conversion systems
Cascaded or combined, diverse conversions in which the...
Current and frequency
363159, H02M 504
Patent
active
042557828
ABSTRACT:
Electrical circuits, apparatus and methods for a variety of applications. A switching device subdivides an alternating current input signal into a plurality of lower voltage pulses by switching on and off in response to the characteristics, such as the voltage and current, of the input signal, and the pulses of current are intermittently passed to a capacitor in series with the device as the voltage on the input signal is positive-going. When the voltage becomes negative-going, the capacitor is discharged, usually with the pulses passing through the switch in the opposite direction. Work is done by energizing the series capacitor, or by energizing a capacitor in parallel with the switch, or by energizing an inductor in parallel or series relation to the switch, or a combination of the above. The inductor may be the primary winding of a transformer, or may create an electrical or magnetic field which is transduced into mechanical motion. The load may also be a resistive load. Where a tranformer is provided, the output of the secondary may be used as a power supply, with or without additional filtration. The transformer may have a unity turns ratio, or may step the voltage up or down as desired. Where the device is used as a power supply, and in other applications, a direct or alternating current output is provided which can be very carefully controlled as to voltage with minimum circuitry being necessary to accomplish this purpose.
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Fitzgibbon James T.
JGF, Incorporated
Miller J. D.
Wong Peter S.
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