Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter
Patent
1990-06-06
1991-04-16
Wong, Peter S.
Electric power conversion systems
Current conversion
Including d.c.-a.c.-d.c. converter
363 56, 363 97, H02M 3335
Patent
active
050087967
ABSTRACT:
A circuit for limiting the effect of overshoot in a transformer of the type having a primary winding and a secondary winding. The secondary winding is coupled to a load and the circuit has an output. An auxiliary or ballistic winding is operatively connected to the transformer and is adapted to generate a winding voltage which varies in response to a voltage generated across the primary winding. An electronic switch, preferably a transistor, is interposed between the ballistic winding and the output of the circuit. The switch is capable of being disposed in a first position or a second position. In one preferred embodiment, the winding voltage is communicated to the circuit output when the switch is in the first position. An actuating arrangement is coupled with both of the ballistic winding and the electronic switch. The electronic switch is disposed into the first position by the actuating arrangement a predetermined time interval after the winding voltage has exceeded a predetermined reference voltage. Accordingly, overshoot is eliminated in the output voltage of the circuit and load regulation of the transformer is improved.
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International Business Machines - Corporation
Wong Peter S.
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