How to know if the EV controller is good or bad

It's a bright day for this chaotic electric car season

1. 5V power supply of measurement controller:Turn on the power supply, measure whether there is 5V voltage in the red line (positive pole) of the handlebar, generally disconnect the handle to measure the voltage is left and right, then it is normal, there is no or more than 5V, the controller is bad.

2. Measure the quality of the power tube of the controllerThe multimeter hits the buzzer file, the red table pen touches the controller thick black (negative pole), the black table pen measures the yellow, green and blue three phase lines of the controller respectively, and the three values measured are basically the same, indicating that the power tube is no problem, and the second group of measurements, the black table pen touches the thick red (positive pole) of the controller, and the red table pen measures the yellow, green, and blue three phase lines of the controller respectively, and these three values are basically the same, indicating that the power tube is no problem.

The two sets of values are not necessarily the same, but each group has almost the same values. If the beep is ticking or the data is abnormal, it means that the power tube is bad, that is, the controller is bad.

Precautions for the use of electric vehicle controllers.

It should be noted that the controller controls the main circuit of the electric vehicle, which has a large current and will emit heat. Therefore, do not expose the electric vehicle to the sun when parked, and do not get in the rain for a long time to avoid the failure of the controller.

When the user rides an electric vehicle, try to start slowly and reduce the starting current as much as possible, and when encountering a relatively long and steep slope, it is best to pedal to help reduce the working current. When the speed control handle is used, it is required to rotate gently, and there is no need to rotate forcefully.

The above content refers to Phoenix.com - How to judge the quality of the electric vehicle controller? Actually, the method is very simple.

Encyclopedia - Electric Vehicle Controller.

Here's how to judge whether a motor controller is good or bad:

1. By observing the back-pressure control ability, Santangqing selects an electric vehicle, unplugs the battery, uses the charger to supply power to the electric vehicle, connects the EABS enabling terminal, ensures that the brake switch is in good contact, slowly rotates the handlebar, so that the motor reaches the highest speed, and brakes repeatedly and quickly, if there is no MOS damage, it indicates that the motor controller is good;

2. Test the current control ability, connect the electric vehicle to the full battery, first let the motor reach the highest speed, choose two motor output lines to short circuit, repeat, and then let the motor reach the highest speed, use the battery positive pole and Wu Yu optional motor line short circuit, repeatedly, if the MOS is not damaged, it indicates that the motor controller is good;

3. Check the efficiency of the controller before impulse, turn off the overspeed function, test the maximum speed reached by different controllers in the case of no load in the same car, the higher the speed, the higher the efficiency, and the better the motor controller.