Maintenance knowledge: how to quickly find faults in electric bicycles

Repairing an electric bicycle is carried out in two steps, that is, troubleshooting and repair. The prerequisite and key to repair is to find faults quickly, just like when a patient goes to a hospital for treatment, the cause of the disease must be found first, and treatment can only be carried out after diagnosis.

1. The car does not turn (that is, the motor does not turn)

1. Use electric vehiclesDetectorTest whether the motor leads have voltage or not, and the faults of the circuit and the control circuit can be immediately judged. The measurement result is that there is voltage, then it is judged that the motor is broken or the lead wire from the controller to the motor is open, and it should be eliminated. If there is no voltage in the measurement result, it is determined that the control circuit is faulty, and the next step should be checked.

2. Put the controllerbrakeThe plug is disconnected, and then turn the electric switch.When the car rotates, it is determined: brakeswitchIt has been damaged and has caused a short-circuit failure. Replace the brake switch with a new one. If the car does not turn, use a good speed control handle to replace the original one. If the car rotates, it is determined that the original speed control handle is broken, causing the electric car to not rotate, and a new controller should be replaced.

3. Measuring the contacts of the battery box can immediately determine the failure of the car not turning due to the power supply. If there is no voltage display, open the power lock, and the indicator on the instrument panel does not light up, it is determined: the fuse fuse is broken, the fuse should be replaced, the wire is off, the weld is broken, or a new wire should be replaced. If there is a voltage display, turn on the power lock and the indicator on the instrument panel does not light up, it is judged that the power lock is broken, and you can replace it with a new lock without powering on.

2. Turn on the power lock, the car will not stop (the car is alarmed), and the car will not stop

The detection method is to disconnect the plug of the controller adjuster speed turning, and it can be immediately judged that the speed control handle or the controller is faulty.

If the car does not turn when the electric door lock is opened after disconnecting the speed control knob plug, it is judged that the speed control knob is broken; if the speed control knob plug is disconnected, the electric door lock is opened and the car is still running, judge and control The device is broken and should be replaced with a new one. (Contribution: Lianhua Chase Technology Development Co., Ltd. Website: http://www.lhdt.com.cn)