The role of the rotor in a motor

The role of the rotor in an electric motor

The stator and rotor are the two necessary parts of an electric motor. The stator is fixed in the casing and usually has a coil wound on it. The rotor is mounted on the machine base by means of bearings or bushings. The term “rotor” is derived from the word “rotating”, and in common parlance, a rotating body supported by bearings is called a rotor, which is the rotating part. An object that does not have its own axis of rotation, such as a compact disk, can be considered a rotor when it is rigidly connected or has an additional axis.

What is the role of the rotor in a motor?

The role of the motor rotor is to generate rotary motion and output torque, and is also the rotating part in the motor. From the point of view of electromagnetism, whether it is AC or DC motor, the rotor of the motor has to interact with the stator of the motor to produce a torque output, in the case of asynchronous motors, when the stator is energized, the stator's three windings will produce a rotating magnetic field, according to the principle of electromagnetic conversion, i.e., a certain strength of the magnetic field and the closed circuit of the Golden House of the relative movement occurs, so that the closed metal circuit will have a Current generation, this rotating magnetic field cutting rotor winding, so the rotor winding will have a current inside, and according to Faraday electromagnetic induction principle, the energized conductor in the magnetic field will be flattered, so the rotor inside the current, and will be subject to the rotating magnetic field of traction, thus generating a rotating torque, so that the rotor to turn up. Motor rotor is also divided into the inner rotor rotation mode and outer rotor rotation mode two kinds. The inner rotor rotation method is a rotating body in the middle of the motor, which outputs torque (referring to the electric motor) or receives energy (referring to the generator). The outer rotor rotation method uses the outer body of the motor as the rotating body, and the different methods are convenient for various applications. The rotor core also serves as part of the motor's magnetic circuit, and the rotor windings serve to induce an electromotive force, which passes through the current and produces an electromagnetic torque. The rotor shaft is the main component that supports the weight of the rotor, transmits the torque and outputs the mechanical power.

Examples of rotor applications in life.

The rotor in a fan rotates the fan blades.

In electric cars, the rotor delivers a powerful torque.

In a washing machine, the rotor drives the inner drum to rotate.