Special Features of Servo Motor:
1) The servo motor is specialized for high-response applications.
2) The servo motor is used for high-precision positioning.
3) The servo motor is capable of accurate rotation angle and speed control.
4) The automatic control of physical quantity is done with servo motor.
5) They are not used for continuous energy conversion but only for precise speed and precise position control at high torque.
6) Their power rating varied from a fraction of watt up to few 100 watts.
7) They produce high torque at all speeds including zero speed.
8) They do not overheat at standstill or lower speed.
9) Due to low inertia they are able to reverse direction quickly.
10) They are able to accelerate and decelerate quickly.
11) They are able to return to a given position without any drift.
Types of Servo Motor:
1) DC servo motor
a) Field controlled DC servo motor.
b) Armature controlled DC servo motor.
c) Permanent magnet armature controlled DC servo motor.
2) AC servo motor
a) 2 Phase AC servo motor.
b) 3 Phase AC servo motor.
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