DC motor structure

Update:18 Feb 2021

Classification: Basic structure It is divided into two […]


Basic structure

It is divided into two parts: stator and rotor. Note: Do not confuse the commutator with the commutator.

The stator includes: main magnetic pole, frame, commutation pole, brush device, etc.

The rotor includes: armature core, armature (shu) winding, commutator, shaft and fan, etc.

Rotor composition

The rotor part of the DC motor is composed of an armature core, an armature, a commutator and other devices. The components in the structure are described in detail below.

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

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

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

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