Which part of the motor is primarily responsible for rotor motion?

The rotor is the component of the motor that is primarily responsible for motion due to its interaction with the magnetic field produced by the stator. In an electric motor, the stator generates a rotating magnetic field when electric current flows through it. This rotating magnetic field induces a magnetic force on the rotor, causing it to rotate and produce mechanical output. The effectiveness of this interaction is crucial; the design and placement of the rotor allow it to align and respond to changes in the magnetic field, leading to consistent motion.

The other components, such as the stator, commutator, and windings, play supporting roles. The stator generates the magnetic field but does not move itself; the commutator helps direct current flow in certain types of motors but does not participate directly in rotor motion; and while the windings create the magnetic fields, it is the rotor's response to these fields that enables motion. Thus, the rotor's interaction with the stator's magnetic field is essential for the motor's operation as a whole.