Shootthrough fault protection system for a voltage source transi

Details Shootthrough fault protection system for a voltage source transi Shootthrough fault protection system for a voltage source transi

1979-09-28

1982-05-25

Salce, Patrick R.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Load shunting by fault responsive means

361100, 363127, 363 55, 363 34, H02H 7122

Patent

active

043319947

ABSTRACT:
Faulted transistors in a voltage source transistor inverter are protected against shootthrough fault current, from the filter capacitor of the d-c voltage source which drives the inverter over a d-c bus, by interposing a small choke in series with the filter capacitor to limit the rate of rise of that fault current. At the same time and in response to a shootthrough fault, a pre-charged capacitor, included in a crowbar circuit connected across the d-c bus, discharges through the faulted transistors in a direction opposite to the fault current in order to effect fast turn-off of the transistors, thereby preventing damage thereto.

REFERENCES:
patent: 3536984 (1970-10-01), Rosenberry, Jr.
patent: 3702962 (1972-11-01), Wohr et al.
patent: 3947748 (1976-03-01), Klein
patent: 4099225 (1978-07-01), Nygaard
patent: 4139885 (1979-02-01), Overzet et al.

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