Servo motor

Servo Motor are also called Control motors. They are used in feedback control systems as output actuators and does not use for continuous energy conversion. The principle of the Servomotor is similar to that of the other electromagnetic motor, but the construction and the operation are different. Their power rating varies from a fraction of a watt to a few hundred watts.
The rotor inertia of the motors is low and have a high speed of response. The rotor of the Motor has the long length and smaller diameter. They operate at very low speed and sometimes even at the zero speed.The servo motor is widely used in radar and computers, robot, machine tool, tracking and guidance systems, processing controlling, etc.
Applications of the Servo Motor
The power rating of the servo motor may vary from the fraction of watts to few hundreds of watts. The rotor of servo motor have low inertia strength, and therefore they have a high speed of inertia. The Applications of the Servomotor are as follows:-

They are used in Radar system and process controller.
Leaf Chain Servomotors are used in computers and robotics.
They are also used in machine tools.
Tracking and guidance systems.
Classification of Servo Motor
They are classified as AC and DC Servo Motor. The AC servomotor is further divided into two types.

Two Phase AC Servo Motor
Three Phase AC Servo Motor
AC Servo Motor
The AC Servo Motors are divided into two types 2 and 3 Phase AC servomotor. Most of the AC servomotor are of the two-phase squirrel cage induction motor type. They are used for low power applications. The three phase squirrel cage induction motor is now utilised for the applications where high power system is required.


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