Electric Bike Manufacturer introduces why the meter displays normally and the motor does not rotate?

cause of issue :
① Judgment of brake handle damage.
②Judge the damage of the speed control handle.
③Judgment of motor damage.
④The controller is damaged

① Unplug the brake lever socket (normally open type brake lever). If the motor is running, the brake lever is faulty, and the brake lever should be replaced.

②The 5V voltage of the handlebar source is normal, check the handlebar signal voltage, rotate the handlebar, the signal voltage should change from low to high at 0.8~4.2V. If the voltage does not change and is less than 1V, it is a fault in the handlebar or a short circuit in the handlebar wire. If the voltage is greater than 1V and the change is normal, check the motor Hall signal (yellow, green, blue lines). If the voltage of the three-phase Hall signal line is all 5V and the contact is good, the motor Hall is damaged, and the motor or motor Hall element should be replaced.

③Check the hall signal wires of the motor separately, and turn the motor slowly by hand. The voltage of each phase should be changed between 0~5V. If the voltage does not change, the hall of the motor is damaged, and the motor or the hall element of the motor should be replaced. If the voltage conversion of each phase is normal and the power supply is normal, the controller is damaged. Replace the controller.

④ Use a multimeter to check the voltage of the controller's power input terminal. The voltage should be greater than 36V (the battery is fully charged). If there is no voltage, check the input line. Check the power supply voltage of the controller's handlebar (connecting the red and black wires of the handlebar). The normal voltage is 5~6V. If there is no 5V voltage, unplug the handlebar socket and the voltage returns to 5V. It may be a short circuit of the motor Hall element, such as If there is still no 5V voltage, the controller is faulty and the controller should be replaced.

⑤First check whether there is a short circuit between the speed control handle and the motor Hall head. Generally, it is more likely to cause a short circuit in the joints after rain and moisture. Therefore, pay attention to the waterproofing of the handle joint. If the controller is damaged, check the handle first before replacing the new controller. Is there a short circuit with the hall switch of the motor? Otherwise it will cause continuous damage to the replacement controller! ⑥ Or the motor does not turn, focus on checking the motor Hall switch and the signal of the handle. If the controller shell is very hot once it is powered on, it is generally because the internal power tube of the controller is short-circuited, and the power should be cut off immediately.

Through the above introduction, Electric Motorbike With Brushless Motor Manufacturers hopes that you can simply refer to the content of this article in future use.