Power semiconductor protection circuit with fault detection

Details Power semiconductor protection circuit with fault detection Power semiconductor protection circuit with fault detection

1979-12-10

1982-03-16

Salce, Patrick R.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific quantity comparison means

361 88, H02H 720, H02H 328

Patent

active

043204341

ABSTRACT:
A protection and fault detection circuit for an electrically isolated semiconductor power driver acting as a switch to connect a load such as a relay coil to a source of voltage employs logic circuitry responsive to input signals indicative, respectively, of the desired state of driver operation and the conductive condition of the driver itself to effect a rendering of the device to the nonconducting state when an overload or other fault condition exists. A monitoring circuit responsive to specified operating parameters of the semiconductor power driver and its associated circuitry provides an output fault signal which is indicative of a fault condition and may be employed for remedial and/or indicating purposes.

REFERENCES:
patent: 3534249 (1970-10-01), Neill et al.
patent: 3678291 (1972-07-01), Coe
patent: 3761775 (1973-09-01), Ozawa et al.
patent: 3764883 (1973-10-01), Staad et al.
patent: 3931547 (1976-01-01), Glogolja
patent: 3932789 (1976-01-01), Sons et al.
patent: 3988695 (1976-10-01), Mattfeld et al.
patent: 4127887 (1978-11-01), Tanaka et al.
patent: 4150413 (1979-04-01), Nerem

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