What type of motor is used in the AC hoist controller as shown in the illustration? Illustration EL-0102
Official USCG Answer & Rule Citation
Correct Answer: Option A — wound rotor induction motor
AC cargo winches requiring high starting torque and variable speed control employ wound rotor induction motors. These motors allow external secondary resistance to be switched in and out of the rotor circuit via contactors during hoisting and lowering operations.
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