Protective circuit for diode switching device

Details Protective circuit for diode switching device Protective circuit for diode switching device

1990-11-16

1993-07-13

DeBoer, Todd E.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Voltage regulator protective circuits

361 58, 361 84, 307127, H02H 900

Patent

active

052279413

ABSTRACT:
An electrical circuit supplying a load from a voltage source includes a switching device and a diode, and is to be protected from recovery current caused by momentary reversal of the diode current during the operation of the switching device. The electrical circuit further includes a transformer having an excitation winding sensing the reverse recovery current through the diode immediately after operation of the switching device, and a sink winding inductively coupled to the excitation winding for inducing in the sink winding a current proportional to the current in the excitation winding. A unidirectional conducting device directs the current induced in the sink winding to the diode to cause reverse recovery of the diode.

REFERENCES:
patent: 4623998 (1986-11-01), Volut
patent: 5036450 (1991-07-01), Kelleher et al.
German Patent Abstract, DE-3008-312 Sep. 1981.

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