1. Brush motor has simple structure, long development time and mature technology. As early as the 19th century, when the motor was born, the practical motor produced was brushless, that is, AC squirrel-cage asynchronous motor. This kind of motor has been obtained after AC power generation. Widely used. However, asynchronous motors have many insurmountable defects, so that the development of motor technology is slow. In particular, brushless DC motors have been unable to put into commercial operation. With the rapid development of electronic technology, they have been put into commercial operation until recent years. In essence, they still belong to the category of AC motors. Brushless motor was born soon, people invented the DC brush motor. Because the DC brushed motor mechanism is simple, easy to produce and process, convenient to maintain, and easy to control; the DC motor also has a fast response, a large starting torque, and the performance of providing rated torque from zero speed to rated speed. It has been widely used since it came out. 2. The DC brush motor has fast response speed and large starting torque. The DC brush motor has fast starting response speed, large starting torque, stable speed change, and no vibration from zero to *. It can drive more when starting Load. The brushless motor has a large starting resistance, so the power factor is small, the starting torque is relatively small, there is a buzzing sound when starting, accompanied by strong vibration, and the driving load is small when starting. 3. The DC brush motor runs smoothly, and the starting and braking effects are good. The brush motor is regulated by pressure regulation, so the starting and braking are stable, and the constant speed operation is also stable. Brushless motors are usually digital frequency conversion control. First AC is changed to DC, and then DC is changed to AC. The speed is controlled by frequency changes. Therefore, the brushless motor runs unsteadily and vibrates when starting and braking. It will be stable. 4. The DC brush motor has high control accuracy. The DC brush motor is usually used together with the reduction gearbox and the decoder to make the output power of the motor greater and the control accuracy is higher. The control accuracy can reach 0.01mm, which can almost make the moving parts stay. In any place you want. All precision machine tools are precision controlled by DC motors. Because the brushless motor is not stable during startup and control, the moving parts will hear different positions every time, and it must be stopped at the desired position through the positioning pin or stopper. 5. The DC brush motor has low use cost and convenient maintenance. Because the DC brush motor has simple structure, low production cost, many manufacturers, and relatively mature technology, it has a wide range of applications, such as factories, processing machine tools, precision instruments, etc. If the motor If it fails, you only need to replace the carbon brush. Each carbon brush only needs a few yuan, which is very cheap. Brushless motor technology is immature, the price is high, and the application range is limited. It should be mainly used in constant speed equipment, such as inverter air conditioners, refrigerators, etc. The brushless motor can only be replaced if it is damaged. 6. Brushless, low-interference brushless motors remove the brushes. The * direct change is that there is no electric spark generated when the brushed motor is running, which greatly reduces the interference of electric spark to remote control radio equipment. 7, low noise, smooth operation of the brushless motor without the brush, the friction is greatly reduced during operation, smooth operation, the noise will be much lower, this advantage for the model operation stability is a huge support. 8. Long life and low maintenance cost. There are fewer brushes. The wear of the brushless motor is mainly on the bearing. From a mechanical point of view, the brushless motor is almost a maintenance-free motor. When necessary, you only need to do some Dust removal and maintenance can be done.