Rotor Composition Of DC Motor

The rotor part of the DC motor is composed of armature iron core, armature, commutator and other devices. Each component in the structure is described in detail below.

1. The armature core part: its function is to embed the armature winding and pass the magnetic flux, in order to reduce the eddy current loss and hysteresis loss generated in the armature core when the motor is working.

2. Armature part: the function is to generate electromagnetic torque and induced electromotive force, and to carry out energy conversion. The armature winding has many coils or glass-coated flat steel copper wire or strength enameled wire.

3. The commutator is also called the commutator. In the DC motor, its function is to convert the current of the DC power supply on the brush into the AC current in the armature winding, so that the tendency of the electromagnetic torque is stable and unchanged. In the generator, it converts the AC electromotive force of the armature winding into the DC electromotive force output on the brush end.

The commutator is composed of many pieces of cylinders with mica insulation, and the two ends of each coil of the armature winding are connected to two commutator pieces. The function of the commutator in the DC generator is to convert the alternating electromotive heat in the armature winding into the DC electromotive force between the brushes. There is a current in the load, and the DC generator outputs electrical power to the load. At the same time, the armature coil also There must be current flowing through. It interacts with the magnetic field to generate electromagnetic torque, and its tendency is opposite to that of the generator. The original idea only needs to suppress this magnetic field torque to cause the armature to change. Therefore, the generator outputs electrical power to the load, but also outputs mechanical power from the original idea, which completes the role of the DC generator to convert mechanical energy into electrical energy.