There are four major components of electric wheelchair: drive system--motor, control system--controller, power system--battery, skeleton system--frame and wheels. At present, there are three types of drives for electric wheelchairs: gear motor, crawler motor and wheel hub motor. The gear motor is the most powerful and can stop on slopes, but the cost is high and the weight of the car is also large. The power of the crawler motor is too small, and the crawler will loosen after a long time.
The in-wheel motor has the lowest cost and light weight, but its power is weak, it cannot stop on the slope, it will slip back and the safety is poor. However, the advantage is that the power consumption is low, and the same battery hub motor will have a much longer battery life. In general, it is recommended to choose an electric wheelchair with a gear motor. The control system currently has a domestic controller. The quality of the controller depends on the steering sensitivity and start-stop sensitivity. Steering is to see if it can rotate 360 degrees on the spot. What can be done is the controller of Niu B. Look at the start-stop speed, some cars start the controller at the lowest speed, the car will start slowly, release the controller, the car will slowly stop within a limited distance.
Some start very quickly, which is too aggressive for the elderly, and will stop after a short pause. This experience is very bad. Batteries are divided into lead-acid batteries and lithium batteries. At present, electric wheelchairs use a voltage of 24V. The greater the amount of power, the longer the battery life in theory. Generally, the battery life is 35AH, and the battery life is 20 kilometers. The bigger ones are 55AH and 75AH, and the battery life is about 30-40 kilometers. The smaller ones are 12-20AH, and the battery life is 10 kilometers. Compared with lead-acid batteries, lithium batteries are lighter in weight and easier to maintain, but their cost is high. At present, domestic lithium battery technology is uneven, and there are potential safety hazards. Although electric bicycles all use lithium batteries, the electric wheelchair industry is still relatively cautious. Manufacturers still use lead-acid batteries. It is also a lead-acid battery. It depends on the self-discharge time for identification.
The skeleton is the material and design, whether it is a fixed design or a folding design. This varies from person to person. If you prefer to carry it, consider ultra-light materials and easy folding. If you consider stability and do not need to be folded, choose a fixed skeleton just wake up structure, because this is the most durable. Wheels are mainly about flexibility and shock absorption. Pneumatic tires have good shock absorption, and it is easier to pass small steps (generally less than 5 cm). Solid tires will skid on small steps. There is a shock absorber that will not be too bumpy through the ditch. Generally, there are four wheels, two front wheels are universal wheels, and two rear wheels are driving wheels. The smaller the front wheel, the more flexible it is, but it is easy to sink in when it encounters a ditch or ground seam. No problem if the front wheel is thicker than 18 inches.