What is a brushed motor
The working commutation has always been achieved by the contact between the graphite brushes (that is, the usual carbon brushes) and the annular commutator installed on the rotor. The fixed main magnetic pole and brushes are installed on the stator, and the rotor is installed with Armature windings and commutators. The electric energy of the power supply enters the armature winding through the brush and the commutator to generate the armature current. The magnetic field generated by the armature current interacts with the main magnetic field to generate electromagnetic torque, which makes the motor rotate to drive the load. Through the brush commutation, the noise of the motor is relatively large, and the frequent switching of the brush may cause electromagnetic interference to other electronic equipment, and the brushed brush# brushed motor# cannot be changed in the state of high power and long-term high temperature operation. Because the arc generated is too large, the power is generally not too large, and the lifespan is relatively low, and the general lifespan is less than a few hundred hours.
The main advantages of brushed motors are:
The cost is low, the speed is simple, the control is easy, and there is no need to match the cumbersome circuit for control. For some medium or low-end products, it is completely possible to use a brushed motor. It is found that the carbon brush is ready to be used up. Buy the same carbon brush model, just replace it in time.
Brushed motors are mainly used in
Early car blowers, cooling fans for water tanks, and shaking-head fans for trucks. Construction electric drills, angle grinders, manual electric grinders, wood cutting machines and tile cutting machines, etc., are all used in industry. Simple structure and convenient use.
What is a brushless motor
The usual brushless motors #brushless motors# are all DC. In recent years, the technology has matured very quickly, and the structure and performance are very good. The brushless DC motor is electronically commutated, and the rotor position is fed back to the control circuit through the Hall sensor, so that it can know the exact time of the motor phase commutation. Speed regulation by voltage is relatively simple and convenient, but it will be limited when the speed is relatively low. It can also be adjusted by voltage. However, the speed control system that needs to be matched is more demanding than the speed control system of the brushed high-speed motor, so it takes a lot of effort to debug the early controller. During use, the control system and the circuit board should be operated with stable voltage throughout the process to ensure the smooth operation of the motor. Now that our technology is mature, brushless motors can achieve high power and are applied in a wide range of fields.
The main advantages of brushless motors are:
First of all, it is used with the controller and the circuit board for speed regulation. The speed of the speed can be adjusted more finely. The output voltage and frequency can be used to control the precise and constant speed. The control is easy. , less noise, no need for frequent maintenance, long life.
Brushless motors are mainly used in
New energy vehicle motors, full DC air-conditioning fans, printers, new direct-drive washing machines, DC cooling fans, hard drives, etc.
