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Bi-directional power control system for voltage converter

United States Patent

5,903,449
May 11, 1999
View the Complete Patent at the US Patent & Trademark Office
A control system for a voltage converter includes: a power comparator for comparing a power signal on input terminals of the converter with a commanded power signal and producing a power comparison signal; a power regulator for transforming the power comparison signal to a commanded current signal; a current comparator for comparing the commanded current signal with a measured current signal on output terminals of the converter and producing a current comparison signal; a current regulator for transforming the current comparison signal to a pulse width modulator (PWM) duty cycle command signal; and a PWM for using the PWM duty cycle command signal to control electrical switches of the converter. The control system may further include: a command multiplier for converting a voltage signal across the output terminals of the converter to a gain signal having a value between zero (0) and unity (1), and a power multiplier for multiplying the commanded power signal by the gain signal to provide a limited commanded power signal, wherein power comparator compares the limited commanded power signal with the power signal on the input terminals.
Garrigan; Neil Richard (Niskayuna, NY), King; Robert Dean (Schenectady, NY), Schwartz; James Edward (Slingerlands, NY)
General Electric Company (Schenectady, NY)
09/ 094,285
June 9, 1998
This invention was made with Government support under contract number DEFC07-96-ID13406 awarded by the United States Department of Energy. The Government has certain rights in the invention.