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Teach you how to distinguish between good and bad electric cars
time:2021-12-10
As we all know, electric vehicles have four main components: motor, battery, controller and charger. Among them, the motor is the core component of the electric vehicle, and it is related to the constant speed of the car. Today, the editor will explain how to quickly distinguish the quality of electric vehicle motors!
First, look at the shell
Electric car motors with gold-plated outer layers usually look brighter, but modified motors are gray and very dark. You can also see the trademark of the electric vehicle motor and whether there is 3C certification. In the end, the electric vehicle motor that meets the industry specifications will be further guaranteed.
Second, listen to the motivation
During the test drive, consumers can feel that the power is strong at the beginning of the load, and the underpowered motor is likely to take out the material from the motor coil.
Third, touch the temperature
When the motor of an electric vehicle stops working, consumers can sense the temperature with their hands. The lower the temperature, the better the heat generation and performance of the motor.
Four, resistance detection
1. To detect the quality of AC three-phase motors, you can use a multimeter to determine whether the A/B/C three-phase resistance values are the same. The greater the value difference, the worse the performance of the electric vehicle motor, the greater the motor power, the smaller the resistance value.
2. Test the quality of AC single-phase motors. Use a multimeter to measure each lead of the winding. If the circuit is not cut off, both meet the requirements and the motor performance is good. If you switch the multimeter to a 1K or 10K resistor, measure the two leads of the capacitor, and the clock hand quickly deflects to the right, and then slowly return to the capacitor on the left, you will find that the capacitor is better.
3. Test the quality of the DC motor. Using a multimeter to measure the inter-chip voltage between the switches, you can know that if the inter-chip voltage between the two blocks has the same law, the winding is normal. (Shakespeare, template, primitive, primitive, native language, native language, native language)
The above is a common method for judging the quality of electric vehicle motors. For general consumers, the fourth one is more complicated, and the first three are more practical. In addition, warm reminder: It is best not to enter the water for electric cars. On rainy days, electric vehicles should also be sheltered from the rain when parking. If the water is short-circuited, the parts will be damaged, thereby shortening the life of the electric vehicle motor.
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