1. When the brushed motor is working, the coil and commutator rotate, but the magnets and carbon brushes do not rotate. The alternating change in the direction of the coil current is completed by the phase commutator and brushes that rotate with the motor. of. In the electric vehicle industry, brush motors are divided into high-speed brush motors and low-speed brush motors. There are many differences between brushed motors and brushless motors. As can be seen from the name, brushed motors have carbon brushes, while brushless motors do not have carbon brushes
2. Brushless DC motors are composed of a motor body and a driver. It is a typical electromechanical integration product. Since the brushless DC motor operates in a self-controlled manner, it does not have an additional starting winding on the rotor like a synchronous motor that starts under heavy load under variable frequency speed regulation, and it will not produce oscillation and loss of synchronization when the load changes suddenly.
3. Brush motors are traditional products with relatively stable performance.
Brushless motors are upgraded products and their lifespan performance is better than brushed motors. However, its control circuit is relatively complex and the requirements for aging screening of components are relatively strict. Although the motor has a long life, the control circuit is prone to failure. Therefore, the selection of brushless motors must undergo strict reliability tests to ensure quality. , but with the continuous upgrade of technology, brushless motor technology has become quite mature.
4. In the actual production process, since the brushed and toothed DC motor is a high-speed motor, the teeth of the gear are very small and easy to wear, but they are powerful and have strong climbing ability. The brushless DC motor saves the trouble of replacing carbon brushes in two or three years during use. However, the process of controlling brushless motors requires extremely high precision. Moreover, brushless motor controllers are also more expensive. In contrast, for brushless and toothless DC motors, although the carbon brushes need to be replaced, it is very easy to replace the carbon brushes, and the control of the motor is relatively simple, the motor runs smoothly, and the safety factor is high.
5. A brushed motor means that the motor has a DC input, and the controller that controls it only provides it with a large or small current to adjust the speed; while a brushless motor is actually a three-phase AC motor that relies on control The converter converts DC power into three-phase AC power, and commutates the phase according to the sensor Hall element in the motor to make the motor operate normally. To put it bluntly, brushless motors have a longer lifespan than brushed motors, start quickly and save energy, but the controller costs more than brushed controllers. At present, all current controllers are brushless, and those with brushes have been basically eliminated. The electric vehicle controller is the core control device used to control the start, operation, advance and retreat, speed, stop and other electronic devices of the electric vehicle. It is like the brain of the electric vehicle and is an important component of the electric vehicle.