Single ended forward converter with resonant commutation of magn

Details Single ended forward converter with resonant commutation of magn Single ended forward converter with resonant commutation of magn

1985-12-19

1987-08-18

Salce, Patrick R.

Electric power conversion systems

Current conversion

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

363131, H02M 3335

Patent

active

046881603

ABSTRACT:
A single ended forward converter periodically resets the transformer core to prevent saturation and returns magnetizing energy to the energy source, requiring only the addition of one resonating capacitor to the converter circuit.
The transformer is reset and the energy recovered into the input voltage source by resonant commutation of the magnetizing current between the magnetizing inductance and a resonating capacitor. A resonant current path is completed during a nonconducting interval of the power transistor switch through a resonating capacitor, shunting the output rectifying diode connected to the secondary winding, and the flyback diode of the output filter to permit transfer of the transformer's magnetizing energy to the input energy source. This magnetizing energy transfer from core to capacitor to input energy source has a resonant quasi-sine waveform and utilizes the resonant properties of the network to enable its flow back into the input voltage source.

REFERENCES:
patent: 4313155 (1982-01-01), Bock et al.
patent: 4415959 (1983-11-01), Vinciarelli
patent: 4498128 (1985-02-01), Peterson et al.
patent: 4559590 (1985-12-01), Davidson
patent: 4559591 (1985-12-01), Grunsch
patent: 4593346 (1986-06-01), Nooijen et al.

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