The maximum torque which a synchronous motor will develop at rest for any angular position of the rotor, at rated stator supply voltage and frequency, is known as__________?
Correct answer: A. locked-rotor torque
- A. locked-rotor torque
- B. synchronous torque
- C. pull up torque
- D. reluctance torque
Explanation
Locked-rotor torque is the maximum torque available when the rotor is stationary, considering the possible rotor angular positions at rated voltage and frequency. Pull-up torque instead refers to the minimum torque available while the motor accelerates toward synchronism.
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