Marine Electrical Systems USCG Question #34 (Set 2)

What is the purpose of the squirrel-cage windings included as part of a synchronous motor?

Official USCG Answer & Rule Citation

Correct Answer: Option B — provide a means for starting

Because synchronous motors are not inherently self-starting under main synchronous speed, squirrel-cage bars embedded in the rotor provide induction motor torque to accelerate the rotor close to synchronism.

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