Two terminal active arc suppressor

Details Two terminal active arc suppressor Two terminal active arc suppressor

1996-04-29

1997-12-30

Gaffin, Jeffrey A.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Arc suppression at switching point

361 4, 361 8, H02H 300

Patent

active

057037434

ABSTRACT:
The arc suppression circuit includes an insulated gate bipolar junction transistor (IGBT) connected across the electrical switch contacts to be protected. When the contacts open, the combination of added Miller capacitance and the gate-to-emitter capacitance of the IGBT results in the IGBT turning on. The IGBT is quickly turned off thereafter by a second transistor, which turns on as the voltage across the suppression circuit rises following turn-on of the IGBT. The turning on of the second transistor results in the first power transistor quickly and abruptly turning off so that relatively little of the load energy is dissipated in the power transistor.

REFERENCES:
patent: 4438472 (1984-03-01), Woodworth
patent: 4658320 (1987-04-01), Hongel
patent: 5081558 (1992-01-01), Mahler
patent: 5402297 (1995-03-01), Ouchi et al.
patent: 5452170 (1995-09-01), Ohde et al.

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