Electricity: power supply or regulation systems – Output level responsive – Using a transformer or inductor as the final control device
Patent
1980-04-14
1981-08-25
Shoop, William M.
Electricity: power supply or regulation systems
Output level responsive
Using a transformer or inductor as the final control device
G05F 126
Patent
active
042862078
ABSTRACT:
An injection transformer has a primary winding series connected with a pair of inverse parallel-connected thyristors between a pair of input terminals. A control circuit is connected across a pair of output terminals for firing the thyristors. The injection transformer has a secondary winding connected between one of the input terminals and one of the output terminals for producing an injection voltage. A filter has components presenting a high impedance to the harmonic frequencies of the injection voltage and a low impedance to the fundamental frequency of the injection voltage, and has components presenting a high impedance to the fundamental frequency of the injection voltage and a low impedance to the harmonic frequencies of the injection voltage. The filter is connected such that the flow of current through the thyristors is limited, the harmonic frequencies are attenuated, and the fundamental frequency is added vectorially to an AC source voltage connectable at the input terminals thus providing a filtered, regulated, AC voltage across the output terminals.
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Banic, Jr. James M.
Spreadbury Robert J.
Pencoske E. L.
Shoop William M.
Westinghouse Electric Corp.
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