AC voltage regulator

专利名称：AC voltage regulator发明人：Chester Schrade申请号：US07/078197申请日：19870727公开号：US04853608A公开日：19890801

摘要：An AC voltage regulator includes a transformer arrangement having a pluralityof taps so that an input line voltage is passed to an output line with the output linevoltage being determined by the nominal value of the input line voltage together with anamount contributed by the transformer. The device is switched by a network of relaysone of which acts as a polarity reversal switch so that the voltage generated by thetransformer is either added or subtracted to the nominal voltage. Further relays used intwo series control the selection of the transformer tap. A transient suppression circuituses a triac and resistor to communicate current from the input line to the output linewith the triac gated into conduction on breaking of a relay contact. The input line voltageis measured by a comparator using a plurality of op- amps in series with the outputstherefrom passing through a logic circuit to control the relays.

申请人：SCHRADE; CHESTER

代理人：Adrian D. Battison,Stanley G. Ade

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