In case of DC servomotor the back-emf is equivalent to an “electric friction” which tends to :
A. Improve stability of the motor
B. Slowly decrease stability of the motor
C. Vary rapidly decrease stability of the motor
D. Have no effect on stability
Answer:A
In case of DC servomotor the back-emf is equivalent to an “electric friction” which tends to :
A. Improve stability of the motor B. Slowly decrease stability of the motor C. Vary rapidly decrease stability of the motor D. Have no effect on stability
Explanation: Back emf is the voltage that is generated in absence of the input and in case of DC servomotor tends to improve the stability of the motor.