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
A)locked-rotor torque
B)synchronous torque
C)pull up torque
D)reluctance torque

Question

Quizplus · Accepted Answer

Locked-rotor torque is the maximum torque a synchronous motor will develop at rest for any angular position of the rotor, when supplied with rated voltage and frequency. This is a key parameter in the design and operation of synchronous motors, indicating the torque available to overcome initial inertia and start the motor.

The Maximum Torque Which a Synchronous Motor Will Develop at Rest