Analysis of electric vehicle motor parts
1. Electric vehicle motor: the main component that converts electrical energy into mechanical energy.
2. Motor base: The main body of the motor plays a role of supporting and fixing.
3. Impeller: the core part of electric vehicle motor. The impeller is further divided into: open impeller, suitable for conveying materials with a large amount of suspended matter, with low efficiency and low pressure of conveying liquid. The semi-closed impeller is suitable for conveying materials that are easy to settle or contain suspended solid particles such as solid particles and fibers, and the efficiency is also low. Closed impeller, suitable for conveying clean liquid without impurities, with high efficiency.
4. Electric vehicle motor shaft: the main component that transmits mechanical energy.
5. Mechanical seal: a device to prevent fluid leakage by keeping it close and sliding relative to each other.
The basic process of electric vehicle motor maintenance
1. Open the power lock to see if the car is turning
First, disconnect the connector of the controller. If the power lock is turned on and the car does not turn, the handlebar is broken; if the power lock is turned on and the car is turning, the controller is broken.
2. The power lock burns insurance or speeds
Disconnecting the controller power plug or motor plug can immediately determine the fault. Disconnect the controller power plug and open the power lock. If the fuse is still burned, it is caused by one or more open circuits in the headlights, horns, dashboard, etc.; if the fuse is not burned, the controller or motor is faulty. In addition, if the insurance value is too low, it will burn the insurance if it cannot withstand high current loads. If there is a runaway phenomenon, it means that the controller is damaged.
3. The motor speed is slow
Measure the interface voltage of the controller at high speed. When the handle is rotated, the output voltage of the signal port changes between 0.8-4.8V, and the handle is broken; measure the power supply voltage with a multimeter in the DC mode, and then measure the motor voltage. If the voltage difference is greater than 1V, the controller is judged to be faulty. In addition, there is abnormal noise when the motor is rotating or the motor housing is overheated during riding. This type of situation should be a motor failure.