How To Judge The Problem Of Electric Vehicles

- Jan 31, 2019-

1) The whole vehicle has no electricity. How to check?

First check if there is power in the power supply. If not, check if the fuse is good. If the fuse is normal and the power supply is not powered, check whether the internal electrode connection of the power supply is loose and the battery is open. Tianjin electric car brand: Jaguar electric car indicates that if the power supply has electricity, check whether the power cord and power lock are normal.


2) How to check if the whole vehicle has electricity and the motor does not turn?

Turn the controller up and short the positive red line and the turn speed yellow line. If the motor is running normally, the motor and controller are good. If the motor does not turn, the motor is bad or the controller is broken.

24inch classic bicycle

If the motor and controller are normal and the motor does not turn, it may be a problem with the handle and the brake lever.


3) How to detect brushless motor?

A. Unplug the motor and the harness connector. Use the multimeter diode file to point the red needle of the multimeter to the thin red wire of the six-pin plug of the motor. The black pin points to the fine yellow, blue, green and black lines. The value is displayed above 900. , the red needle is pointed on the black line, the black needle is on the fine yellow, blue, green and red lines, the value is displayed as 500-600. Displaying zero or infinity is bad.


In the power-on state of B, use the 200V DC voltage file of the multimeter, the black needle refers to the thin black wire of the six-pin plug, the red needle refers to the fine yellow, blue and green lines respectively, and the motor is rotated, and the voltage shows 0-6.25 volts. Change between. The maximum and minimum values of the three lines should be similar.


4) How to detect the transfer?

Use the multimeter 20 volt voltage file to measure the controller's nine-pin plug. The black pen refers to the thin black line, and the red pen refers to the thin yellow line. At this time, the voltage should be about 1 volt, turn the handle to the bottom, and the multimeter shows 1 volt. To 4.2 volts or 4.8 volts, the turn is good.


5) How to detect the brake lever?

Use the multimeter 20 volt voltage file to measure the controller's nine-pin plug. The black pen refers to the thin black line. The red pen refers to the fine purple line. The voltage is displayed as 6 volts. If the brake is zero, the brake is often powered off. At this time, the multimeter should display zero, and if the voltage is constant, the brake will be powered continuously.


6) How to detect the brushless controller?

A power tube damage detection: the power tube bad performance is the whole vehicle does not turn or lack of phase, the specific measurement method is: use the diode test controller A, B, C three-phase motor wiring, the black pen of the multimeter is connected to the power red line, The red pen is connected to the phase line of the three-phase motor, and the multimeter should display the value of 500-600. If the phase test result shows zero or small, the upper power tube of the phase will break down. If the display is very large, it will be broken; The red pen of the multimeter is connected to the power ground wire, and the black pen is connected to the phase line of the three-phase motor respectively. The display value of the multimeter should be about 500-600. If the display is zero or small, the lower power tube of the phase is broken down, if the display is very Great power tube disconnection