Method and circuit for protecting power circuits against short c

Details Method and circuit for protecting power circuits against short c Method and circuit for protecting power circuits against short c

1996-01-26

1997-11-11

Gaffin, Jeffrey A.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Voltage regulator protective circuits

361 98, 363 51, H02H 700

Patent

active

056870493

ABSTRACT:
A fault protection circuit for protecting IGBT's and other non-latching semiconductor devices in power circuits, for example, power converting/inverting circuits, against phase to phase, phase to earth and shoot through short circuit faults as well as against over current faults. The circuit provides local protection for devices on the high side of such power circuits, and transfers the fault to the low side where it is detected and appropriate control circuitry is activated to latch the fault, thereby avoiding the need for isolcated sensing or feedback to protect the high side devices as well as the complete power circuit.

REFERENCES:
patent: 4706177 (1987-11-01), Josephson
patent: 4870556 (1989-09-01), Inaba et al.
patent: 4894762 (1990-01-01), Steinshorn
patent: 5123746 (1992-06-01), Okado
patent: 5155671 (1992-10-01), Inaba et al.
patent: 5280228 (1994-01-01), Kanouda et al.

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