It is difficult to see the good or bad of the electric car from the appearance. How can consumers choose a good quality car when buying a car? The detection of the controller is essential. The high-quality controller can guarantee the normal operation of electric vehicles, and can also ensure the safety of users to the greatest extent. Well, High Power Electric Motorcycle Manufacturers teaches you how to judge the pros and cons of the controller of an electric vehicle. In general, it needs to go through five aspects: observe workmanship, compare temperature rise, observe back pressure control capability, current control capability, and verify controller efficiency.

1. Carefully observe the workmanship:

The workmanship of a controller reflects the strength of a company. Under the same conditions, the workshop controller is definitely not as good as the products of large companies; the products of manual welding are definitely not as good as the products of wave soldering; A thicker controller is better than a wire-cutting controller; a radiator with a heavy controller is better than a radiator with a lighter controller, etc. Companies that are pursuing in materials and processes are relatively credible, and the comparison can be seen .

2. Contrast temperature rise:
Use the newly sent controller and the original controller to conduct the heat transfer test under the same conditions. Both controllers remove the radiator, use a car, prop up the foot, first turn the handle to reach the highest speed, immediately Brake, don't brake to prevent the controller from entering the locked-rotation protection, maintain it at very low speed for 5 seconds, release the brake, quickly reach the highest speed, then brake, repeat the same operation, such as 30 times, detect the maximum temperature of the radiator point. Comparing the data from the two controllers, the lower the temperature, the better. The test conditions should ensure the same current limit, the same battery capacity, the same car, and also start the test from the cold car, maintaining the same braking force and time. At the end of the test, the tightness of the screws fixing the MOS should be checked. The greater the looseness, the worse the temperature resistance of the insulating plastic particles used. In long-term use, this will cause the MOS to be damaged by heat in advance. Then install the heat sink and repeat the above test to compare the temperature of the heat sink. This can investigate the heat dissipation design of the controller.

3. Observe the back pressure control ability:
Choose a car, the power can be a little bigger, unplug the battery, choose a charger to power the electric car, and connect the E-ABS enable terminal to ensure that the brake lever switch is in good contact. Turn the handle slowly, too fast, the charger can not output a large current, it will cause undervoltage, let the motor reach the highest speed, brake quickly, repeat many times, and there should be no MOS damage. When braking, the voltage at the output of the charger will rise rapidly, testing the instantaneous voltage limiting capability of the controller. This test has basically no effect if tested with batteries.

4. Current control capability:
Connect a fully charged battery, the larger the capacity, the better, let the motor reach the highest speed first, choose two motor output lines to short circuit, and repeat it, more than 30 times, there should be no MOS damage; then let the motor reach the highest speed, use the battery positive and An optional motor line is short-circuited and repeated 30 times to test the rapid control ability of the controller. Many controllers will be ugly in this link. If damage occurs, you can compare the number of times the two controllers successfully withstand the short circuit, the less the worse. This part of the experiment can verify the reliability design of the controller software and hardware.

5. Check the controller efficiency:
Turn off the overspeed function, if any, test the maximum speed achieved by different controllers under the same car without load. The higher the speed, the higher the efficiency and the higher the cruising range. The above tests are carried out without any special equipment, and the operability is strong. A wide comparison of the differences in the workmanship, temperature rise, voltage and current control and efficiency of the controller can basically reflect the advantages and disadvantages of the controller. Consumers may wish to choose the above experimental method according to the situation when purchasing electric vehicles, and purchase more reliable electric vehicles.

The above content is shared by TAIZHOU SUQIER NEW ENERGY SCIENCE AND TECHNOLOGY CO.,LTD. in the hope of helping those in need.