Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter
Patent
1989-07-06
1990-04-10
Wong, Peter S.
Electric power conversion systems
Current conversion
Including d.c.-a.c.-d.c. converter
363 91, 363136, H02M 3335, H02P 1324
Patent
active
049165909
ABSTRACT:
A series resonant power supply is switched at a constant frequency above the audio range, in which a magnetic amplifier is used to control the magnitude of the output voltage. It can be run silently, while providing high power at relatively low cost. The power supply includes a full or half bridge rectifying circuit with first and second common terminals. A magnetic amplifier is coupled from the first common terminal to a second common terminal. The magnetic amplifier includes a first primary coil for conducting current from the first common terminal to the second terminal. A secondary coil for generating an output current, and a control coil receiving a control current are coupled with the first primary coil. A second primary coil is connected to conduct current from the second common terminal to the first common terminal. A second secondary coil and a second control coil are coupled with the second primary coil. The current is induced in the first and second secondary coils in response to current in the control coils, and current through the respective primary coils. An output circuit is coupled across the first and second secondary coils for converting the output of the magnetic amplifier to the regulated DC output.
REFERENCES:
patent: 3406330 (1968-10-01), Pelly
patent: 3971975 (1976-07-01), Genvit
patent: 4031452 (1977-06-01), Longa et al.
patent: 4217632 (1980-08-01), Bardos et al.
patent: 4442479 (1984-04-01), Makimaa
patent: 4495555 (1985-01-01), Eikelboom
patent: 4811187 (1989-03-01), Nakajima et al.
Chambers, "A New High Frequency Resonant Technique For Dynamic Correction Of Off-Line Converter Input Current Waveforms", Proceedings of POWERCON 10, San Diego, CA, Mar. 22-24, 1987, F-1, pp. 1-7.
Reference Data for Radio Engineers, Fifth Edition, published by International Telephone and Telegraph Corporation (1968, pp. 14-1 through 14-5).
Spectra-Physics
Wong Peter S.
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