Overcurrent detector for an inverter

Details Overcurrent detector for an inverter Overcurrent detector for an inverter

1983-11-01

1985-08-13

Moose, Jr., Harry E.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Voltage regulator protective circuits

361 87, 363 57, H02H 7122

Patent

active

045353786

ABSTRACT:
An overcurrent detector for an inverter is provided, which detector includes a filter capacitor and snubber circuits, and comprises: a first circuit which detects a current flowing through the DC main circuit of the inverter and provides a first signal in proportion to the magnitude of this current; a second circuit which generates a second signal corresponding to the magnitude of snubber currents flowing through said snubber circuits; and a third circuit which generates a third signal corresponding to the difference between the first signal and the second signal. The third signal is an output signal of the overcurrent detector, a protection circuit of the inverter being made operative by this third signal.

REFERENCES:
patent: 4099225 (1978-07-01), Nygaard
patent: 4442480 (1984-04-01), Downhower, Jr. et al.

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