Circuit and method for discharging DC filter capacitors

Details Circuit and method for discharging DC filter capacitors Circuit and method for discharging DC filter capacitors

1988-12-29

1990-06-12

Salce, Patrick R.

Electricity: battery or capacitor charging or discharging

Serially connected batteries or cells

With discharge of cells or batteries

320 13, 322 25, H02J 700

Patent

active

049336223

ABSTRACT:
An electric generating system having a discharge circuit for a DC filter capacitor includes an electric power source for producing a DC voltage on a pair of conductors and a DC filter capacitor electrically connected between the conductors. A voltage indicating signal, representative of the actual output voltage of the generator, is combined with a reference signal to obtain a control signal which varies in proportion to the difference between the desired output voltage of the power source and the actual output voltage. Power source output voltage is controlled in response to the control signal. A branch circuit with a solid state switching device is connected across the DC filter capacitor. The solid state switching device is turned on for a limited time in response to a change in the magnitude of the control signal resulting from an increase in the actual output voltage of the power source, thereby discharging the DC filter capacitor.

REFERENCES:
patent: 3987356 (1976-10-01), Steigerwald
patent: 4237385 (1980-12-01), Jurgens et al.
patent: 4807106 (1989-02-01), Baker et al.

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