With electric vehicles penetration is higher and higher, the market competition is fierce, many companies and businesses except in the make an issue of product price and appearance, also in electric vehicles are playing on the small details of advertising, which is more for the motor with brush and brushless publicity, advertising and brushless motor is one of the highlights. When you see this term, you can't help thinking that since there is no brush, there must be brush, so what is the difference between brush and no brush?

1. When the motor is working, the coil and commutator rotate, the magnetic steel and the carbon brush do not turn, and the alternating change of the coil current direction is completed by the commutator and the brush rotating with the motor. In the electric vehicle industry, brush motors are divided into high-speed brush motors and low-speed brush motors. There are many differences between brush motor and brushless motor. As can be seen from the name, brush motor has carbon brush, brushless motor does not have carbon brush

2, the brushless DC motor is composed of the motor body and driver, is a typical mechatronics products. Because the brushless DC motor is operated by automatic control, so it will not be like the frequency conversion under the heavy load start synchronous motor in the rotor as another start winding, also will not produce vibration and out of step when the load mutation.

3, brush motor is a traditional product, relatively stable performance. Brushless motor is an upgraded product, its life performance is better than the brush motor. But its control circuit is more complex, the aging of components screening requirements are more strict. Although the motor has a long life, the control circuit is prone to malfunction. Therefore, the selection of brushless motor through strict reliability test to ensure quality. But with the continuous upgrading of technology, brushless motor technology has been quite mature.

4. In the actual production process, because the brush-toothed DC motor is a high-speed motor, the teeth of the gear are small, easy to wear, but the force is large and the climbing ability is strong. Brushless DC motor, in the use of two or three years to save the trouble of carbon brush. But because in the brushless motor control process, high precision is required. Moreover, the price of brushless motor controller is also higher. In contrast, brushless DC motor without teeth, although the carbon brush needs to be replaced, it is very easy to replace the carbon brush, and the control of the motor is relatively simple, the motor runs smoothly, and the safety factor is high.

5, brush motor refers to the motor is DC input, control its controller only to provide it with the size of the current can speed; The brushless motor is actually a three-phase AC motor, which depends on the controller to convert the direct current into three-phase alternating current and perform the conversion according to the sensor Hall element in the motor to make the motor run properly. Directly speaking, the brushless motor is longer than the brush motor life, power saving starting, but the controller is higher than the brush controller cost. At present, now are brushless controller, brush has been basically eliminated. Electric vehicle controller is used to control electric vehicle motor start, run, advance and retreat, speed, stop and other electronic components of electric vehicle core control device, it is like the brain of electric vehicle, is an important part of the electric vehicle.