Torque control for DC servo motor using adaptive load torque compensation

A torque control system is an important process in industries. The value of torque which is generated by DC servomotor depends upon a motor current. Since the torque control system uses the estimated current from an observer, it will receive an effect from torque disturbance (load torque) during an operation. The incorrect estimated current from the observer affects a current feedback signal. This paper presents a technique for torque control of DC servomotor by using adaptive load torque compensation. The load torque can be compensated to the observer, the result show that the estimated current error from the observer is reduced. Therefore, this method can be applied to improve an efficiency of the torque control system and estimate the load torque of DC servomotor.