Electric power conversion systems – Current conversion – With condition responsive means to control the output...
Patent
1986-09-29
1987-11-24
Beha, Jr., William H.
Electric power conversion systems
Current conversion
With condition responsive means to control the output...
363 26, 363134, H02M 7538, H02M 3337
Patent
active
047093234
ABSTRACT:
A DC-AC converter circuit for a power supply contains a parallel resonant circuit topology. Accordingly, stray capacitance associated with the converter forms a part of the resonant circuit and assists in setting the resonant frequency thereof. The energy in the stray capacitance which is normally lost is recovered by the resonant circuitry. A coupled inductor is connected in series with a primary winding of an output transformer of the converter. The coupled inductor includes a resonating inductor winding and an energy recovery winding which are tightly wound out of phase with one another. Energy from the resonant inductor winding is coupled to the recovery winding when the switching elements of the converter are switched on and off. Therefore, energy otherwise dissipated in switching operation is conserved by being returned to its source. Further, the switching elements of the converter are connected in series through diodes to the return line. Consequently the converter is capable of operating either in a buck or boost mode and to switch from one mode of operation to the other.
REFERENCES:
patent: 3418557 (1968-12-01), Schaefer
patent: 3818307 (1974-06-01), Hamilton et al.
patent: 3921005 (1975-11-01), Watrous
patent: 3938024 (1976-02-01), Clarke
patent: 4186434 (1980-01-01), Cowett
patent: 4223378 (1980-09-01), Koizumi
patent: 4480300 (1984-10-01), Luursema
Beha Jr. William H.
Venus Scientific Inc.
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