Servo voltage stabilizers save the life of costly appliances, CNC machines, electrical equipment, medical equipment, motors lab equipment etc. by correcting the voltage fluctuations in the incoming AC voltage and bringing and keeping in at the desired voltage levels.
It involves comparing the output voltage with built-in stable reference voltage source. The control circuit operates the motor whenever the output voltage falls or rises beyond the preset voltage.
The control circuit controls the servo motor. The motor is mechanically attached to the arm of a continuously variable auto transformer which feeds to the primary of a series control buck boost transformer. The stabilizer output voltage is compared with the reference voltage & resultant error signal controls the Servo Motor which corrects the voltage by bringing it to the preset voltage.