Three Phase Servo Voltage Stabilizer

A servo voltage stabilizer is a closed-loop control mechanism which serves to maintain balanced 3 or single-phase voltage output despite fluctuations at the input owing to unbalanced conditions.Based on amount of high voltage or low voltage observed at input, “motor driver” moves servo motor across winding of autotransformer (variac) so as to increase or decrease the number of winding and hence voltage across primary of buck-boost transformer.