The commutator mainly has hook type, slot type, flat type and other specifications It is refined from imported raw materials, and its functions reach the level of the previous generation. It is widely used in electric tools, household appliances, automobiles, motorcycle motors and other fields; The collector ring, carbon brush holder and terminal block have various specifications and models, which are used in automobile generators, gasoline generators and other fields Commutator is used for rectification, and its function is to make the current direction in armature winding alternating, so as to ensure that the electromagnetic torque direction is always unchanged In the generator, the commutator can change the alternating potential in the element into the direct current potential between the brushes; It can change the external DC current into the AC current in the component in the electric drive unit, and generate torque in a constant direction. Information about commutator and slip ring motor:

The commutator is composed of electric brush and reversing ring, and carbon brush is a kind of electric brush. As the rotor rotates, the brush always rubs with the reversing ring, and the electric spark burns at the moment of reversing, so the brush is a vulnerable part in the DC motor.

In order to improve the service life and operation stability of DC motor and reduce the noise and electromagnetic interference of DC motor, brushless DC motor has the tendency to gradually replace the brush motor

AC asynchronous motors are divided into two types: generally, the factory used wound asynchronous motors with large starting loads have slip rings, so they use electric (carbon) brushes (such as lifting and rolling motors), while the squirrel cage induction motors with light load start do not have slip rings, so they do not use electric (carbon) brushes (such as electric fans, washing machines, air conditioners, refrigerators, etc.). DC motors have commutators, so they use electric (carbon) brushes The electric hand drill is generally a DC motor, while the bench drill is an AC asynchronous induction motor; Although ordinary toys and electric razors are DC motors, because of their simple structure, they use flexible brass sheets containing phosphorus to replace the electric (carbon) brush reversing device, which is a wearing part of electric razors (the wire package inside the motor is generally not damaged)

Generally, AC motors do not need constant magnetic fields, so they do not need commutators, and therefore do not need brushes; But the volume of AC motor is generally large The motors used in household appliances are generally AC motors, such as fans, washing machines, refrigerators, air conditioners, etc., which do not have carbon brushes, but some use DC motors, such as many electric razors, kitchen appliances, electric bicycles, etc., which have carbon brushes, even DC motors (excluding brushless motors). The motors using dry batteries are DC motors