Zero-current switching quasi-resonant converters operating in a

Details Zero-current switching quasi-resonant converters operating in a Zero-current switching quasi-resonant converters operating in a

1986-06-20

1988-01-19

Wong, Peter S.

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

323235, G05F 140

Patent

active

047206675

ABSTRACT:
A family of quasi-resonant converters for providing regulated power is disclosed as comprising a voltage source, a load and a resonant switch circuit, for periodically connecting the voltage source to the load. The resonant switch circuit includes a switch, and a resonant circuit comprised of a resonant capacitor and a resonant inductor. The switch is actuated to its first state to permit a current flow in a first direction from the voltage source to the load and to block a current flow in a second, opposite direction, and deactuated to a second state to permit a current flow in the second direction from the load to the voltage source and to block the current flow in the first direction, whereby the quasi-resonant converter is operative in a full-wave mode. More specifically, the switch in its first state couples the resonant capacitor and the resonant inductor together to form a resonant switch circuit. The impedances of the resonant capacitor and the resonant inductor are selected to establish a resonating current waveform on the resonant inductor to apply zero-current conditions to the switch at turn on and turn off.

REFERENCES:
patent: 4016461 (1977-04-01), Roland
patent: 4168477 (1979-09-01), Burchall
patent: 4323845 (1982-04-01), Leach
patent: 4417197 (1983-11-01), Schwarz
patent: 4546421 (1985-10-01), Bello et al.
patent: 4585986 (1986-04-01), Dyer
patent: 4592763 (1986-06-01), Dietz et al.
patent: 4620271 (1986-10-01), Musil

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