Protective circuitry for semiconductor switches

Details Protective circuitry for semiconductor switches Protective circuitry for semiconductor switches

1981-02-18

1983-03-29

Eisenzopf, Reinhard J.

Electric power conversion systems

Current conversion

Including automatic or integral protection means

361 91, 361100, 363 19, H02H 7122

Patent

active

043785867

ABSTRACT:
A circuit for protecting a semiconductor switch which connects an inductive load to a voltage supply. The switch is shunted by the series combination of a diode and a capacitor. The capacitor is connected to the input terminals of flyback converter, the converter having a control input terminal for receiving a control signal which also controls the conduction state of the semiconductor switch. The electrical energy which is provided at output terminals of the protective circuit may be advantageously returned to the voltage supply so as to reduce to a minimum the electrical energy dissipated in the protective circuit, or, alternatively, such energy may be available for any desired use, illustratively, as an auxiliary power supply.

REFERENCES:
patent: 4261032 (1981-04-01), Cavigelli
"Thyristoren", B. G. Teubner Stuttgart, 1974, p. 41.

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