10 "Sweeping machine brush plate motor(E008)

A pure electric vehicle motor is a speed-regulated drive system composed of an AC motor and its matching controller. The AC motor refers to the AC asynchronous traction motor, which is driven by the rotating magnetic field to rotate the rotor. The structure is simple, the reliability is strong, the driving circuit is also simple and reliable, and the efficiency is high. Compared with rare earth permanent magnet motors, permanent magnet motors are expensive, and some of the comprehensive prices are twice that of AC asynchronous motors. Especially once electric vehicles become popular and rare earth resources are in short supply, the price will skyrocket, making electric vehicles very uneconomical and affecting the development of electric vehicles. Popularization: There are also complex driving circuits, poor reliability, and difficult heat dissipation, which makes the actual efficiency inferior to AC asynchronous motors; rare earth permanent magnet motors are usually water-cooled, which makes the power structure complex and the cost increases. In contrast, the advantages of AC motors are very obvious.

Applications:

pure electric logistics vehicles, pure electric passenger cars, pure electric postal vehicles, pure electric sanitation vehicles, etc.

To summarize the advantages:

1. The protection level is high, the efficiency is high, and the reliability is strong.

2. It is cost-effective and has a large starting torque.

3. Long life, easy maintenance, simple structure and low noise.

4. The motor end cover and base are made of aluminum alloy structure, which is small in size and light in weight.

5. Stepless speed regulation, strong overload capacity.

6. The structure is compact and the power density is high.

Troubleshooting:

① Damage judgment of the speed control handle (accelerator pedal):

The source voltage of the handlebar (accelerator pedal) is normal, detect the signal voltage of the handlebar, turn the handlebar (accelerator pedal), the signal voltage should change from low to high within a certain range. If the voltage does not change and is less than 1V, the handlebar (accelerator pedal) is faulty or the handlebar (accelerator pedal) line is short-circuited. If the voltage is greater than 1V and the change is normal, the handlebar (accelerator pedal) is normal, check other items.

② Motor damage judgment:

Detect the signal line of the motor encoder separately, and turn the motor slowly by hand. The voltage of each phase should vary within a certain range. If the voltage does not change, the motor encoder is damaged, and the electric vehicle motor or motor encoder should be replaced. If the voltage transformation of each phase is normal and the power supply is normal, the controller is damaged and the controller should be replaced.

③ Controller damage judgment:

Use a multimeter to detect the voltage of the input terminal of the controller power supply, the voltage should be greater than the rated voltage (the battery is fully charged), if there is no voltage, the input line should be checked. Check the power supply voltage of the controller handlebar (connect the red and black wires of the handlebar), if there is no voltage, unplug the handlebar socket, and the voltage recovers, the motor encoder may be short-circuited, if there is still no voltage, the controller is faulty, The controller should be replaced.

④ Judgment of comprehensive situation:

First check whether the speed control handle (accelerator pedal) and the electric vehicle motor encoder are short-circuited. Generally, it is more likely to cause a short-circuit of the connector after rain and moisture. Therefore, pay attention to the waterproofing of the handle (accelerator pedal) connector. If the controller is damaged, replace it Before the new controller, check whether the signal line of the handlebar (accelerator pedal) and the motor encoder is short-circuited? Otherwise, it will cause continuous damage to the replacement controller.