Fault detection apparatus for a transformer isolated transistor

Details Fault detection apparatus for a transformer isolated transistor Fault detection apparatus for a transformer isolated transistor

1991-10-21

1992-08-25

Pellinen, A. D.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific voltage responsive fault sensor

361 86, 361 56, 340662, H02H 904

Patent

active

051424320

ABSTRACT:
A protection circuit which electrically isolates logic level and high-side circuits and detects high side power device fault conditions at the isolated, logic level side of the circuit. When an overvoltage or overcurrent condition occurs at the power switching device, a protection circuit disables the conduction of current through the current carrying terminals of the switching device, preventing damage from occurring to the device. Activation of the protection circuit effects an increased current flow in the secondary and primary coils of the isolation transformer between the low side and high side elements. Voltage at the primary coil of the isolation transformer is monitored by low level circuitry to detect the rise in current, indicating a fault to the system controller upon detection.

REFERENCES:
patent: 4423457 (1983-12-01), Brajder
patent: 4511815 (1985-04-01), Wood
patent: 4551779 (1985-11-01), Murakami et al.
patent: 4686383 (1987-08-01), Croft
patent: 4859921 (1989-08-01), Archer
patent: 4893211 (1990-01-01), Bynum et al.
patent: 4908857 (1990-03-01), Burns et al.
patent: 4937727 (1990-06-01), Leonardi
patent: 4967332 (1990-10-01), Claydon et al.
patent: 4979068 (1990-12-01), Sobhani et al.
patent: 5019719 (1991-05-01), King

Affiliated with

Also associated with

Rating

Fault detection apparatus for a transformer isolated transistor does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Fault detection apparatus for a transformer isolated transistor , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fault detection apparatus for a transformer isolated transistor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-390179