Circuit for detecting diode shorting

Details Circuit for detecting diode shorting Circuit for detecting diode shorting

1978-09-22

1980-08-12

Moose, Jr., Harry E.

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

For relays or solenoids

340645, H01H 4722

Patent

active

042176212

ABSTRACT:
A circuit for detecting the shorting of a diode in a circuit for rectifying AC current. A current transformer senses the current flowing through a diode. A DC bias current applied to the transformer secondary winding along with the unidirectional pulses normally passed by the diode cause saturation of the transformer core so that the normal current passed by the diode does not induce corresponding pulses in the secondary winding. In the event of diode shorting reverse current pulses will produce corresponding pulses in the secondary winding and those pulses are detected by a relay so that relay actuation occurs upon diode shorting.

REFERENCES:
patent: 3045168 (1962-07-01), Fellendorf
patent: 3493839 (1970-02-01), De Puy
patent: 3899737 (1975-08-01), Aston

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