BALANCED_BRIDGE_REVERSING_DRIVE

Published:2009/7/22 2:00:00 Author:Jessie | From:SeekIC

Phase-sensitive servo drive supplies reversible half-wave power to armature of small permanent magnet or to shunt motor. Power circuit consists of two half-wave circuits back-to-back (SCR1-CR1 and SCR2-CR2) fired by ujt Q1 on either positive or negative line half-cycle depending on direction of unbalance of reference bridge containing sensing element R1, which can be photoresistor, thermistor, potentiometer, or output from control amplifier.- Silicon Controlled Rectifier Manual, Third Edition, General Electric Co., 1964, p 142.



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