Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter
Patent
1988-10-18
1989-08-15
Wong, Peter S.
Electric power conversion systems
Current conversion
Including d.c.-a.c.-d.c. converter
363 26, 363 41, 363 97, 330104, 330260, 330291, H02M 3335
Patent
active
048580945
ABSTRACT:
Improved load regulation is provided in a switched mode power supply having an integrator, with a controlled reference signal connected thereto, a comparator circuit and a square wave generator, connected to the terminals of an AND circuit, and AND circuit connected to a power driver outputting to a transformer having two secondary windings. A current sensing resistor connected to the power driver is fed back to the comparator where this current level is compared with the integrator output. A first secondary winding is connected through a diode to the load with a capacitor connected across the load and a second secondary winding is connected in a feedback line to the integrator with a series diode, a capacitor is connected across the second secondary winding with a voltage divider connected across the second secondary line in parallel with the capacitor. The above arrangement is for current mode topology and an alternate arrangement is shown for voltage mode topology. A separate embodiment is disclosed for use with a push-pull type of switching power supply.
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Allied-Signal Inc.
Smith Robert C.
Wong Peter S.
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