A Servo-Controlled Voltage Stabilizer is an electrical device that automatically regulates and stabilizes output voltage, protecting connected equipment from damaging fluctuations like sags and surges. Its working principle is based on a closed-loop feedback system. A microprocessor-based control circuit continuously monitors the input voltage and, when a deviation from the desired output is detected, it sends a signal to a servo motor. . This motor is mechanically coupled to a variable transformer (dimmerstat), which it rotates to precisely 'buck' (decrease) or 'boost' (increase) the voltage. This continuous, smooth adjustment, unlike the discrete steps of a relay-type stabilizer, provides a highly accurate and stable output voltage, typically within a narrow tolerance of ±1%. This makes it an ideal solution for protecting sensitive and expensive equipment in industrial, commercial, and medical applications.
