Some careful consumers will find that some front drive geared electric bicycle motors are "brush motors" while others are "brushless motors" when they buy electric bicycles. So how to distinguish front drive geared electric bicycle motor is "brushless motor" or "brush motor"?
The difference between the front drive geared electric bicycle motor is "brush" or "brushless":
Simply, you can identify the front drive geared electric bicycle motor from its appearance as "brushed" or "brushless".
First of all, there are 8 leads for "brushless" electric bikes, while there are two leads for "brushed" electric bikes; secondly, when the motor is driven by hand, the "brushless" motor rotates back and forth easily. The "brush" motor is easy to turn in the front, but tighter in the back.
To sum up: the general brush motor only two lines, brushless has three thick lines and five thin lines.
The "brushless" motor is better than the "brush" motor
From the prevailing use of the industry, there are two main types of front drive geared electric bicycle motors: brush motors and brushless motors.
1. Brush motor
Most of the front drive geared electric bicycle motors on the market are still in the brush motor stage. Brush motors use mechanical commutation, which requires less technology for the control system, and the relative cost is lower than brushless motors. But the fatal weakness is a short life, high noise, low efficiency. Its long-term use of carbon brush wears serious, more easily damaged. At the same time, the wear produces a large amount of carbon dust, the dust falls into the gear oil so that the gear oil accelerates the drying, motor noise further increases.
Brush motor use for about a year will need to replace the carbon brush inside, you will find that charging a driving mileage is less than two-thirds of the new car bought, and climbing the hill when the power is not enough, but also burn the controller. This is because the motor replacement carbon brush, the commutator is also worn out a groove so that the carbon brush contact area is reduced, poor contact with the carbon brush power will generate sparks and accelerate the oxidation of commutator and copper, resulting in the above-mentioned bad phenomenon.
2. Brushless motor
Brushless motor with electronic commutation instead of mechanical commutation, technically superior to brush motor. Since the brushless motor has no gear or reduction device, it reduces the unreliability of motor wear. Its efficiency is higher than that of brushed motors within a certain current range. A Brushless motor is almost noiseless when driving and has a long life of more than 10 years.
According to the comparison between the two, a brushless motor is better than a brush motor. At present, there are already some front drive geared electric bicycle motor manufacturers who originally used brush motors and now use brushless motors instead. Brushless motor is definitely the future direction of electric bicycle development.