Explain the principle of operation and constructional features of a three- phase squirrel cage and a three-phase wound rotor (slip ring) induction motor With the aid of diagrams, describe the principle of operation and constructional features of both types of induction motors. Produce a table that compares the two types of three-phase induction motors: cage motor and wound rotor motor. Your comparison should include their constructional features, connections, synchronous speed, slip, losses and efficiency, torque, and speed, starting methods.

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Single Phase Induction Motor

The single-phase induction motor or engine consists of a single rotating phase in the stator and a rotating cage in the rotor. When phase one supply is connected to the stator winding, a magnetic field is generated. In the pulsating field, the rotor does not rotate due to inertia. So, a single-phase import motor does not start and requires some initial methods.