What is a Servo Motor :
A servomotor is a rotary actuator or linear actuator that allows for precise control of angular or linear position, velocity and acceleration. They are also called control motors and have high torque capabilities. If the motor as a controlled device, associated with servomechanism is AC motor, then it is commonly known AC Servo Motor. If DC operates the controlled motor, it is called DC Servo Motor.
How Servo Motors Work :
- The large industrial motors, they are not used for continuous energy conversation but only for precise speed and precise position control at high torque.
- Basic principle of operation is the same as that of other electromagnetic motors.
- The input to its control is a signal representing the position commanded for the output shaft. This signal maybe either analogue or digital.
- This type of servomotor is not widely used in industrial motion control. It’s applications are also commonly seen in remote-controlled Toy cars for controlling the direction of motion, and and cheap servo used for radio-controlled models.
Due to their lo inertia they have high speed of response.that is why they are smaller in diameter but longer in length they generally operate at very low speed or sometimes zero speed they find wide application in in order tracking and guidance system, process controller, computer and machine tools. both DC and AC two phase and three phase servo motors are used at present.