Inverter power supply with input power detection means

Details Inverter power supply with input power detection means Inverter power supply with input power detection means

1992-05-27

1993-06-22

Stephan, Steven L.

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

363 95, 363 97, 363131, H02M 3335

Patent

active

052220150

ABSTRACT:
An inverter power supply, for driving a magnetron or the like, where an A.C. voltage from a commercial A.C. power source is rectified to obtain a D.C. voltage which then is switched periodically by a switching device to be converted to a high frequency which then is converted to a D.C. to obtain a predetermined D.C. output. The inverter power supply includes a modulation circuit for amplitude-modulating an output control voltage responsive to the an output value of the D.C. output by an A.C. input voltage from the commercial A.C. power source to obtain an object input waveform; a difference output circuit for taking difference between the object input waveform obtained by the modulation circuit and an input current waveform from the commercial A.C. power source; and a control circuit for controlling an ON period of the switching device responsive to a difference output from the difference output circuit.

REFERENCES:
patent: 4244015 (1981-01-01), Beebe
patent: 4777575 (1988-10-01), Yamato et al.
patent: 4942509 (1990-07-01), Shires et al.

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