High forward blocking voltage protection circuit

Details High forward blocking voltage protection circuit High forward blocking voltage protection circuit

1989-06-28

1990-06-26

Salce, Patrick R.

Electric power conversion systems

Current conversion

Including automatic or integral protection means

363 21, 363131, H02H 7122

Patent

active

049377264

ABSTRACT:
To protect a semiconductor switch from high forward blocking voltage stresses during turn-off, a relief circuit is provided comprising a diode and a capacitor. The energy generated when the semiconductor switch is turned off or switched to the non-conducting state, is temporarily stored in the capacitor of the relief circuit until the semiconductor switch is changed back to its conducting state. Then the energy stored in the capacitor is transferred to a useful impedance by means of a further semiconductor switch being changed to its conducting state.

REFERENCES:
patent: 3628047 (1971-12-01), Cronin
patent: 4268898 (1981-05-01), Brown
patent: 4336587 (1982-06-01), Boettcher et al.
patent: 4378586 (1983-03-01), Bete
patent: 4403269 (1983-09-01), Carroll
patent: 4438486 (1984-03-01), Ferraro
patent: 4607322 (1986-08-01), Henderson
patent: 4700083 (1987-10-01), Raets
patent: 4754385 (1988-06-01), McDade et al.
Clemente, et al., "Apply a Few Design Rules to Avoid Destroying Power FETs", Electronic Design News, May 13th, 1981, pp. 126-130.

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