The high-speed motor is slightly more expensive because its armature winding resistance is small, while the low-speed motor has a larger resistance. Therefore, the high-speed motor consumes less current during driving. I suggest that I buy a high-speed motor.
In the previous market, three types of motors are more common: brushed high-speed motors, brushed low-speed motors, and brushless low-speed motors. The motor is what we often say. The high-speed motor has high power and high speed (under normal driving, high-speed motor 3000 rpm, low-speed motor 500 rpm), it needs to be decelerated by a reduction gear device to output large torque power, so its noise is higher than that of low-speed motor The noise is relatively loud.
However, the advantages of high-speed motor vehicles can be shown under overloading or climbing road conditions. Because of these advantages, high-speed motors have more complicated production processes and relatively higher costs than low-speed motors, so the price is slightly more expensive.
We should pay more attention to our daily car purchases. Don’t assume that there is no wear and tear because the motor is silent, and the car will be in good condition. You must know that the main indicators of a motor are motor efficiency and power. The biggest weakness of low-speed motors is the motor’s low efficiency, heavy weight, poor power, weak riding, and high power consumption.
Because the brushed high-speed motor has a high speed (3000 rpm for high-speed motor and 500 rpm for low-speed motor), it needs to be decelerated by a reduction gear device to output large torque power, so its noise is relatively larger than that of low-speed motors. The production process of high-speed motors is more complicated than low-speed motors, and the cost is high. The price is about 200 yuan more expensive. Like some famous brand electric vehicles, high-speed motors are often used.
High-speed motor: The relative rotation speed of the stator and the rotor of the high-speed motor is fast, the back electromotive force generated is high, the working current is limited in the winding, the current consumption is small, and it is relatively power-saving.
Low-speed motor: On the contrary, the low-speed motor has a low relative speed, low back electromotive force, low current limit ability, large current consumption, and waste of electricity. This phenomenon is especially obvious when running uphill and upwind. At this time, the vehicle speed is lower, the back electromotive force is almost zero, and the working current consumption is particularly large. For a battery with a small capacity, it will exceed the allowable discharge current and shorten its life.
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