The maximum constant load torque under which a synchronous motor will pull into synchronism at rated rotor supply voltage and frequency is known as___________?
Correct answer: B. pull-in torque
- A. pull-up torque
- B. pull-in torque
- C. pull-out torque
- D. none of the above
Explanation
Pull-in torque is the maximum constant load torque at which a synchronous motor can accelerate and lock into synchronism under the specified voltage and frequency. Pull-out torque is instead the maximum torque it can sustain after already operating synchronously.
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