DC motor principle
A ring-shaped permanent magnet is fixed inside the DC motor, and a current generates a Lorentz force through a coil on the rotor. When the coil on the rotor is parallel to the magnetic field, the direction of the magnetic field that continues to be rotated will change, so the brush at the end of the rotor at this time Alternating contact with the converter, so that the direction of the current on the coil also changes, the direction of the Lorentz force generated is unchanged, so the motor can maintain one direction of rotation. It can be seen from the schematic diagram of the working principle of the DC motor and the generator that the structure of the DC motor should be composed of two parts: the stator and the rotor. The part of the DC motor that is stationary during operation is called the stator. The main function of the stator is to generate a magnetic field. It consists of a base, a main pole, a commutating pole, an end cover, a bearing and a brush device. The part that rotates during operation is called the rotor. Its main function is to generate electromagnetic torque and induced electromotive force. It is the pivot of energy conversion of DC motor, so it is usually called armature. It is changed by shaft, armature core, armature winding, and It consists of a transmitter and a fan.
