G - Physics – 05 – F
Patent
G - Physics
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G05F 1/24 (2006.01) G05F 1/30 (2006.01)
Patent
CA 1193655
-22- Abstract Feed Forward AC Voltage Regulator Employing Step-Up, Step-Down Transformer and Analog and Digital Control Circuitry A feed forward AC voltage regulator utilizes a step-up, step-down transformer to apply adjust- ment voltages to an unregulated AC line. Analog circuitry periodically samples the unregulated AC line input and compares it with a scaled represen- tation of the desired line voltage. Digital circuitry converts the information from the analog sampling and comparison to an instruction command which activates an appropriate solid state switch associated with a tap on a multitap transformer connected to the regulated AC output line. The taps are successively located on the multitap transformer to provide selectable adjustment voltages of various values. The switched-in adjustment voltage is provided the proper polarity and applied to the primary of the step-up, step- down transformer, thereby applying to the secondary the adjustment voltage needed to move the regulated AC output line to the desired level.
425628
R. William Wray & Associates
Varian Associates Inc.
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