Lao Wang is a stall owner who has been running a vegetable business in the vegetable market for many years. The electric three-wheeled vehicle is an essential tool for him to travel back and forth between the vegetable market and the vegetable wholesale place every day. This vehicle has accompanied him through countless busy mornings and evenings and is an indispensable partner in his business.

One morning, Lao Wang was preparing to go to the wholesale market to purchase goods as usual. When he turned the key to start the electric three-wheeled vehicle, the vehicle made an abnormal noise, and its power was obviously insufficient. It jerked while running, and the speed was much slower than usual. This really worried Lao Wang. If he couldn’t reach the wholesale market in time, he would miss the time to purchase fresh vegetables, and the business of that day would be affected.

Based on his years of experience using the electric three-wheeled vehicle, Lao Wang initially judged that there might be a problem with a certain key component of the vehicle. He barely drove the vehicle to a familiar electric vehicle repair shop nearby. The repairman first checked the tire pressure and found nothing abnormal. Then he checked the battery charge, and the battery was also fully charged. Subsequently, the repairman began to check the electrical circuit system, examining each connection point of the circuit one by one to see if there were any loose or short-circuiting situations, but everything was normal.

After a careful inspection, the repairman suspected that there was a malfunction in the controller of the electric three-wheeled vehicle. As the core component of the electric three-wheeled vehicle, the controller is like the engine of a car, responsible for controlling key parameters such as the speed and torque of the motor. Once there is a problem, the performance of the vehicle will be greatly reduced. To verify this suspicion, the repairman used professional testing equipment to test the controller and found that some electronic components inside the controller had been damaged, resulting in unstable transmission of control signals, which was the root cause of the vehicle’s abnormal condition.

After determining the problem, the repairman explained the situation to Lao Wang and recommended several controllers suitable for his electric three-wheeled vehicle. These controllers have different brands and models, different prices, and some differences in functions. Some controllers have higher power output, which can make the vehicle more powerful; some perform excellently in energy conservation and can extend the vehicle’s cruising range. Considering that his electric three-wheeled vehicle is mainly used for daily short-distance transportation and has a relatively high demand for power, Lao Wang chose a controller with moderate power, reliable quality, and a reasonable price.

The repairman quickly started to replace the controller. He first disconnected the power supply of the electric three-wheeled vehicle to ensure the safety of the operation. Then he carefully removed the old controller. This process required extra care because there were many complex wires connected around the controller. Next, the repairman installed the new controller in the correct position and carefully connected each wire to the new controller accurately according to the wiring diagram. After the connection was completed, the repairman checked the entire circuit repeatedly to ensure that there were no omissions or errors.

When everything was ready, the repairman reconnected the power supply and started the electric three-wheeled vehicle. In an instant, the familiar and smooth starting sound came. Lao Wang tried to turn the throttle, and the vehicle responded quickly, with sufficient power. There was no more jerking during the driving process, and the speed also returned to the normal level. The worried look on Lao Wang’s face finally disappeared, and a satisfied smile appeared on his face.

After this incident of controller repair, Lao Wang deeply realized the importance of the controller of the electric three-wheeled vehicle. He also reminded other electric three-wheeled vehicle owners to pay more attention to the maintenance of the vehicle usually, regularly check the key components, and once they find any abnormalities in the vehicle, they should promptly troubleshoot and repair it to avoid major failures caused by minor problems, which will affect normal use. From then on, Lao Wang took even better care of his electric three-wheeled vehicle. He would carefully check it before each trip to ensure that the vehicle was in good condition and safeguard his business.