In case of DC servomotor, the back emf is equivalent to an “electric friction” which tends to:
A. Slowly decrease the stability of the system
B. Improve stability of the system
C. Very rapidly decrease the stability of the system
D. Have no effect of stability
Answer:B
In case of DC servomotor, the back emf is equivalent to an “electric friction” which tends to:
A. Slowly decrease the stability of the system B. Improve stability of the system C. Very rapidly decrease the stability of the system D. Have no effect of stability
Explanation: As Back emf in dc servomotors provides necessary centrifugal force to control the speed of the motor that increases the stability of the system.