DC 서보모터의 센서리스 속도 제어

Sensorless Speed Control of DC servo moter

DC servo motors are widely used in many industrial fields as actuator of robot and driving power motors of electrical vehicle. Usually in the speed control systems of DC servo motors, speed sensors are required and this fact results in the increased price and operating cost and the limitted application of the motors. In this paper, a new speed control method for DC servo motor is proposed. In the scheme, the rotational speed is estimated by the measurement values of the armature voltage and current, instead of measurement by sensor. This paper also report on the results of experiments to prove the validity of the proposed method.