Views:90 Author:Site Editor Publish Time: 2021-09-13 Origin:Site
You can see the strength of a company from the craftsmanship of the electric wheelchair joystick controller.
Controllers from workshops are certainly not as good as the products of larger companies.
A controller with a pretty look is better than the one without a pretty look.
A controller with thick wires is better than the one with thinner wires
A controller with a heavier heat sink is better than the one with a lighter heat sink.
2.The temperature rising
Conducted locked-rotor test on the newly delivered controller and the used controller under the same conditions. Both controllers are tested after heat sinks are removed. An electric wheelchair vehicle is needed in the test. Firstly, turn the handlebar to reach the maximum speed, then, brake sharply. Do not completely brake it lest the controller go into blocking protection. Keep the very low speed for 5 seconds, then release the brake to reach the maximum speed and brake again. Repeat the process for around 30 or more times and then detect the highest temperature point of the heat sink. Record the data from both controllers and compare them. The lower the temperature the better the controller.
3. Backpressure capability
Choose a large-power electric wheelchair vehicle, unplug the battery, and use the charger to power the electric vehicle. Connect the e-abs enable terminal and make sure the brake switch is in good contact. Turn the handlebar slowly because the charger cannot output a large current and will cause undervoltage if you quickly turn the handlebar. When the motor reaches the maximum speed, brake sharply and repeat many times, no mos damage should occur.
When braking, the output voltage of the charger will increase rapidly. It's a test for the controller's ability to limit the voltage instantaneously. This test makes no sense if the battery is not removed. This test can also be carried out on a fast downhill slope.
4.Current control capability
Use a full battery (the larger the capacity the better) to let the motor reach the highest speed. Conduct a short circuit in any two motor output lines and repeat for more than 30 times, and there should be no mos damage. Then let the motor reach the highest speed, conduct a short circuit with the positive terminal of the battery and any one of the motor lines and repeat 30 times. This test is severer than the above one. The circuit lacks a mos internal resistance, so the instant short circuit current is greater. It's a test for the controller's capability to control the current quickly is tested. This part of the experiment can verify the reliability of the controller software and hardware.
Turn off the overdrive function (if it has the overdrive function), test the maximum speed reached by the different controllers on the same car with no load; the higher the maximum speed, the higher the efficiency and the larger cruising radius.