H - Electricity – 02 – M
Patent
H - Electricity
02
M
321/26, 346/61
H02M 3/335 (2006.01) B61L 3/00 (2006.01) H02P 13/18 (1980.01)
Patent
CA 1186730
ABSTRACT OF THE DISCLOSURE A multiple output d.c. to d.c. regulating circuit in- cluding an input protection circuit for providing protec- tion 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 spare-wave signals. The square- wave signals are fed to a magnetic saturable reactor regu- lator which has its controlled windings connected by a rectifying filtering network to a pair of main output termi- nals 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 cir- cuit operational amplifier. The output of the integrated circuit operational amplifier is connected to the control winding of the saturable reactor for controlling the con- trolled 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. in- verter. An overload protection circuit senses overloads on the input and main output terminals and causes removal of power from the regulating circuit.
414226
American Standard Inc.
Fetherstonhaugh & Co.
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