In Ward-Leonard control the lower limit of speed is imposed by________?
Correct answer: A. residual magnetism of the generator
- A. residual magnetism of the generator
- B. core losses of motor
- C. mechanical losses of motor and generator together
- D. all of the above
Explanation
At very low speed, the motor needs only a small applied voltage, but the Ward-Leonard generator cannot reduce its output below the voltage associated with residual magnetism. This residual voltage sets the practical lower speed limit.
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