Marine Electrical Systems USCG Q#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.

Advertisement