SERVO MOTOR VS RELAY VOLTAGE REGULATION

According to AED INTERNATIONAL.."The Servo type voltage regulators, stabilizes the voltage by adjusting the transformer to the desired output voltage. This ensures the highest precision in voltage stabilization. The method using relays to regulate the voltage is all done electronically, therefore less precision."
It is a fact that because of the inherent accuracy of the servo motor the voltage "taps" can be positioned more precisely over a broader range of voltages than the predetermined, preset method achieved by the relay method. The servo motors are constantly receiving and responding to signals from the varying input voltages and adjusts the output accordingly in small, corresponding increments not in predetermined, preset large jumps.