Turn-off circuit for gate turn off SCR

Details Turn-off circuit for gate turn off SCR Turn-off circuit for gate turn off SCR

1990-01-31

1991-07-09

Zazworsky, John

Electrical transmission or interconnection systems

With nonswitching means responsive to external nonelectrical...

Temperature responsive

307305, 307634, 307637, H03K 1772

Patent

active

050308629

ABSTRACT:
Turn-off of a GTO-SCR with substantially reduced tail current is achieved by means of a controlled switching circuit coupled to the both the anode gate and the cathode gate of the thyristor. When operated, the switching circuit simultaneously removes current from the cathode gate and injects current into the anode gate, thereby completely removing stored charge. The controlled switching circuit preferably comprises a transistor the collector-emitter path of which bridges the anode and the anode gate of the GTO SCR, and injects anode gate current at the same time that current is being removed from the cathode gate. Control of the base drive to the bridging transistor may be effected by a current mirror drive circuit referenced to the cathode gate of a turn-off control thyristor.

REFERENCES:
patent: 3638042 (1972-01-01), Studtmann
patent: 4626703 (1986-12-01), Patalong et al.
patent: 4821083 (1989-04-01), Ogura et al.
patent: 4833587 (1989-05-01), Sugayama et al.
patent: 4866315 (1989-09-01), Ogura et al.

Affiliated with

Also associated with

Rating

Turn-off circuit for gate turn off SCR does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Turn-off circuit for gate turn off SCR, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Turn-off circuit for gate turn off SCR will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-620195