What are the advantages and disadvantages of Servo Systems (Servo motors)?


Servo systems - Three phase AC current generates a magnetic field.The system continuously monitors position relative to commanded position and adjusts current and voltage accordingly

Advantages of Servo system -

Closed loop control
Higher torque at higher speed
Very efficient - lower motor heating
Better choice for variable load system

Disadvantages of Servo system-

More complex control - tuning required
Position feedback required -increase cost
Higher overall system cost


Any ideas about the servo package market share in India? I heard that Fanuc, Simens are most famous.