High-speed motor and low-speed motor have different structures, and the price difference is around 200 yuan. Be sure to ask about the motor configuration when buying a car. The structure of brushless motor is similar to that of low-speed motor. The high-speed motor is above 400 yuan, and the price of low-speed motor is around 200 yuan.
Two differences, high-speed motor, as the name implies, has high power, strong starting and climbing, and saves electricity, with high motor efficiency (up to 80-85%), long driving range and long battery life ~ but the cost is high because of high motor speed, internal gear deceleration and large torque; The riding resistance is also very small when there is no electricity. High-speed motor has a small disadvantage, that is, the motor speed is high, there is a slight abnormal noise of the motor gear, and the disassembly is complicated.
The advantage of low-speed motor is its low speed and no gear transmission system, so the noise of motor is very low. Moreover, there is no wear inside the motor, so the failure rate is low and the maintenance is convenient. The disadvantage is almost that there is no advantage of high-speed motor ~ of course it is relative. However, due to the demagnetization of the motor magnetic steel, the power performance is obviously reduced after 2-3 years of use, and the one-time continuous charging ability is obviously shortened after replacing the new battery.
The choice of two pairs of batteries for electric vehicles should consider the combination of voltage and capacity. For example, when some cars are equipped with 24 volts and 8 amps, and some cars are equipped with 48 volts 16 amps, the price difference will be 2-3 times. This is what you need ~
Third, it is best to buy a brand-name machine with independent research and development, production, patent and good after-sales service system; Try not to buy that kind of spare parts assembly, which is low in price, low in configuration, exaggerating publicity and impacting the market at a low price. Although they may be similar in appearance, they are quite different in materials, spare parts, processing technology and after-sales service ~
Personally, I suggest you change it. Nothing can't be repaired. It is more expensive to repair it than to buy one.