Resonant converter for stabilized operation of switching devices

Details Resonant converter for stabilized operation of switching devices Resonant converter for stabilized operation of switching devices

1988-04-06

1989-08-15

Salce, Patrick R.

Electric power conversion systems

Current conversion

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

363 56, 363133, H02M 3335

Patent

active

048580961

ABSTRACT:
An impedance for short-circuit prevention is connected with a secondary winding side of a transformer of a resonant converter comprising a resonant circuit, a D.C. input source, and a switching devices. The short-circuit prevention impedance is driven by the driving current generated in a driving winding in accordance with a resonance current at the primary winding side of the transformer, thereby obviating the stop of an oscillation. The oscillation can be stopped at a timing of not generating a surge voltage in the switching devices by detecting a current returning to the D.C. input power source.

REFERENCES:
patent: 3818312 (1974-06-01), Luursema et al.
patent: 4015171 (1977-03-01), Miller
patent: 4334267 (1982-06-01), Miko
patent: 4424556 (1984-01-01), Maeda et al.
patent: 4466041 (1984-08-01), Witulski et al.
patent: 4755923 (1988-07-01), Maeba et al.
Ninomiya et al.; "Voltage-Mode Resonant Push-Pull Converter with Magnetic Power Controllers"; PESC 87; 7/87.
Ninomiya et al., "Characteristics of Parallel Resonant Push-Pull Converter Controlled by Magnetic Amplifiers"; Japan Society of Applied Magnetism, vol. 11, No. 2, Jun. 1987.

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