What is a servomotor?


A servomotor is a general term used for a specific kind of linear or rotary actuators.  Servomotors are motors that constantly monitor to control its motion, speed, torque, acceleration, and position. For allowing this accurate control, the motor uses a sensor, feedback encoder, and a controller to create a closed-feedback system. 

The type of motor used in a servomotor depends largely on the application the servo motor is intended to be used for. For heavy-duty industrial applications, large alternate current induction motors are used connected to  variable speed drives to control its RPM. For smaller industrial applications, BLDC motors or even brushed DC motors are often used. The best performing servomotors use direct drive torque motors, brushless AC PM motors, however. These torque motors create a wide torque and speed range in a compact and efficient servomotor design.