Which component is referred to as the rotating part of an AC motor?

The rotating part of an AC motor is known as the rotor. The rotor is crucial in the operation of AC motors because it interacts with the magnetic field generated by the stator to create motion. When alternating current flows through the stator windings, it generates a rotating magnetic field. This rotating field induces current in the rotor, which in turn creates a magnetic field of its own. The interaction between these fields causes the rotor to turn, thus producing mechanical energy.

Understanding the role of the rotor is fundamental to grasping how AC motors operate, as it directly affects the efficiency and effectiveness of the motor. In contrast, the stator is the stationary part of the motor, surrounding the rotor and providing the magnetic field necessary for its operation. The motor housing encapsulates these components for protection and structural support, but it does not contribute to the movement itself. The armature, while a term often associated with DC motors, does not apply directly in the same way to AC motors, as they utilize the rotor and stator to generate motion. This terminology distinction helps clarify the specific components and their functions within various types of motors.