1, carefully observe the work
The work of a electric wheelchair motor reflects the strength of a company. Under the same conditions, the workshop controller is certainly not as good as the products of large companies.Manual welding products are certainly not as good as wave soldering down the product;A nice-looking controller is better than a product that doesn't care about it;A controller with thick wires is better than one with jerry-built wires;Radiator controller is better than the radiator light controller and so on, in the use of materials and technology to pursue the relative credibility of the company is high, the contrast can be seen.
2, contrast temperature rise
From with the new controller and original use forward controller in the same condition of the hot test, two controllers are torn down, radiator in a car, hold up, turn the turn first to reach the top speed, brake immediately, don't brake to death, so that the controller into the wall protection, at very low speed lasts for 5 seconds, loosen the brake and quickly achieve the high speed, brake again,Repeat the same operation, say 30 times, to check the maximum temperature of the radiator.Comparing the two controllers, the lower the temperature, the better.
3. Observe the back pressure control ability
Select a car, the power can be a little bigger, unplug the battery, choose the charger to power the electric car, connect the E-ABS enabling terminal, to ensure that the brake switch is in good contact.Turn the knob slowly, if it is too fast, the charger can not output a large current, which will cause undervoltage. Let the motor reach the highest speed, brake quickly, and repeat for many times. MOS damage phenomenon should not appear.
When braking, the voltage at the output end of the charger will rise rapidly to test the instantaneous voltage limiting ability of the controller. This test has no effect if the battery test is used.The test can also be carried out on a fast downhill, braking when the car reaches maximum speed.
4, current control ability
Connect the full battery, the larger the capacity, the better, first let the motor reach the highest speed, choose two motor output line short circuit, repeated, more than 30 times, should not appear MOS damage;Then let the motor reach the maximum speed, short-circuit with the positive electrode of the battery and one of the selected motor wires, repeated for 30 times. This test is more severe than the above test. There is a MOS internal resistance less in the circuit, and the instantaneous short-circuit current is larger, which tests the controller's ability of rapid current control.This part of the experiment can verify the reliability design of the controller software and hardware.
5, check the efficiency of the controller
Turn off the overspeed function, if any, and test the maximum speed achieved by different controllers in the same car without load. The higher the maximum speed, the higher the efficiency and the higher the range.