As shown in the illustration, what type of motor is controlled as depicted in both figure "A" and in figure "B"? EL-0144

Question

As shown in the illustration, what type of motor is controlled as depicted in both figure "A" and in figure "B"?  EL-0144

Accepted Answer

Option A: three phase wound rotor induction motor. Wound rotor induction motors utilize external resistance in the rotor circuit to control starting torque and speed. The illustrations show the characteristic slip rings and external resistor banks connected to the rotor windings, which are distinct features of wound rotor motors compared to standard squirrel cage induction designs.