What is the rotor?

What is the rotor?

• A. The rotating member of an electrical machine.
• B. The stationary part of a machine.
• C. The magnetic core.
• D. The protective housing.

Answer: (A)

Rotor is the rotating member of an electrical machine. It sits on the shaft and turns when the machine operates, driven by the electromagnetic torque from the stator’s magnetic field. Depending on design, the rotor may carry windings (wound rotor) or consist of conducting bars shorted at the ends (squirrel-cage rotor). The stator is the stationary part that provides the magnetic field, the magnetic core is the iron material that guides flux (present in either rotor or stator as part of the machine’s construction), and the protective housing is just the outer enclosure. So the defining idea is that the rotor is the part that rotates.

Rotor is the rotating member of an electrical machine. It sits on the shaft and turns when the machine operates, driven by the electromagnetic torque from the stator’s magnetic field. Depending on design, the rotor may carry windings (wound rotor) or consist of conducting bars shorted at the ends (squirrel-cage rotor). The stator is the stationary part that provides the magnetic field, the magnetic core is the iron material that guides flux (present in either rotor or stator as part of the machine’s construction), and the protective housing is just the outer enclosure. So the defining idea is that the rotor is the part that rotates.