Current limit circuit in single-ended forward converter utilizin

Details Current limit circuit in single-ended forward converter utilizin Current limit circuit in single-ended forward converter utilizin

1983-07-07

1985-02-05

Wong, Peter S.

Electric power conversion systems

Current conversion

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

363 56, H02M 3335

Patent

active

044981287

ABSTRACT:
Current limit protection against current overload is obtained in a core-reset, forward-type converter by inserting a properly selected impedance in the flyback current path. The voltage developed across the impedance is impressed against the secondary winding of the power transformer. During current overload, the voltage drop across the impedance maintains a voltage drop across the secondary winding delaying a zero crossing of the voltage and, hence, delaying the initialization of conduction in the converter power switch. The time delay in conduction initiation in the power switch reduces current output and effectively counteracts the overload current.

REFERENCES:
patent: 4058758 (1975-11-01), Peterson
patent: 4172276 (1979-10-01), Kameya
patent: 4263643 (1981-04-01), Koike
patent: 4272805 (1981-06-01), Iguchi et al.
patent: 4327404 (1982-04-01), Horiguchi
patent: 4377842 (1983-03-01), Cambier

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