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What is a brushless motor for electric cars?
- Feb 27, 2018 -

Most electric bikes currently on the market still stay in the brushed motor stage. Brushed motor with mechanical commutation, the technical requirements of the control system is lower, the relative cost is lower than the brushless motor, brushed motor starting torque slightly larger than the brushless motor. But the fatal weakness is: short life, noisy, low efficiency. Long-term use of carbon brush wear serious, more easily damaged. At the same time wear and tear have produced a large amount of carbon dust, these dust fall gear oil, gear oil to accelerate dry, motor noise further increases. Brush motor use about a year or so will need to replace the brush, you will find that charging a mileage less than when the new car bought two-thirds, and lack of motivation when climbing, but also burn the controller. This is because the motor replacement carbon brush, the commutator has also been worn out of a groove, reducing the contact area of the carbon brush, poor contact carbon brush will produce sparks and speed up the oxidation commutator and copper, resulting in the above unpleasant sight.

 

Brushless motor to electronic commutation to replace the mechanical commutation, technically better than brush motor. Because there is no gear or deceleration device of brushless motor, it reduces the unreliability of motor wear. Its efficiency is higher than brush motor in a certain current range. Brushless motor drives almost no noise, and life expectancy of up to 10 years.

 

According to the comparison between the two, brushless motor is better than brush motor. At present, some electric bicycle manufacturers originally used brushless motors instead of brushless motors. Brushless motor is certainly the future direction of the development of electric bicycles.



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