Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter
Patent
1981-08-14
1984-07-24
Beha, Jr., William H.
Electric power conversion systems
Current conversion
Including d.c.-a.c.-d.c. converter
361 56, 361 91, 363 49, 363 56, 363 91, H02P 1322
Patent
active
044620691
ABSTRACT:
A multiple output d.c. to d.c. regulating circuit including an input protection circuit for providing protection against input overcurrent, input transient voltages, sustained input overvoltage and input polarity reversal. The protection circuit powers a d.c. to a.c. inverter which generates high frequency square-wave signals. The square-wave signals are fed to a magnetic saturable reactor regulator which has its controlled windings connected by a rectifying filtering network to a pair of main output terminals and connected by transformer rectifier filter circuits to a plurality of auxiliary output terminals. The d.c. output voltage across the main output terminals is sampled and is compared to a reference voltage of an integrated circuit operational amplifier. The output of the integrated circuit operational amplifier is connected to the control winding of the saturable reactor for controlling the controlled windings so that the square-wave signals are pulse width modulated to regulate the d.c. voltages developed across the pair of main output terminals and the plurality of auxiliary output terminals. A soft starting circuit prevents high in-rushing currents from damaging the d.c. to a.c. inverter. An overload protection circuit senses overloads on the input and main output terminals and causes removal of power from the regulating circuit.
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Electron, (G.B.), No. 83, pp. 23-25, 23 Oct. 1975, 56070-0010R.
American Standard Inc.
Beha Jr. William H.
Sotak J. B.
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