Electric car brush and brush, how simple distinction?Buy BrushlessDon't tell me what line to look at. What should I see when I buy it? How can I make a simple distinction?
First, the brush motor adopts mechanical reversing, the technical requirements of the control system is lower, the relative cost is lower than the brushless motor, and the starting torque of the brush motor is slightly larger than the brushless motor. But the fatal weaknesses are short life, high noise and low efficiency. Its long-term use of carbon brush, serious wear and tear, easy to damage. At the same time, a large amount of carbon dust is produced, which falls into the gear oil to accelerate the drying of gear oil, and further increases the motor noise. There is a brush motor use about a year, you need to change the carbon brush, you will find that charging mileage is less than 2/3 of the new car bought, but also lack of power when climbing, but also burn the controller. This is because the motor to replace the carbon brush, commutator also grind a groove, reduce carbon brush contact area, poor contact power will produce sparks, and accelerate the oxidation of copper and lead to the commutator, bad phenomenon.
From the appearance of identification, motor belongs to "brush" or "brush"?":First of all, "brushless" electric car lead has 8, and "brush" electric car lead is positive and negative, there are two;Secondly, when the motor is driven by hand, the "brushless" motor is easy to rotate before and after, and "brush" motor before turning easy, after the turn is more tight.
Brushless motor with electronic commutation instead of mechanical reversing, technically better than a brush motor. Since brushless motor has no gear or reducer, it reduces the unreliability of motor wear. Its efficiency is higher than that of a brush motor in a certain range of current. Brushless motor runs almost without noise, and the service life is more than 10 years. According to the comparison, brushless motor is superior to brush motor. At present, some electric bicycle factories have used brush motors, and now they use brushless motors. Brushless motor is certainly the future direction of the development of electric bicycles.
