Electric wheelchair - main factors affecting price and power:
Motor horsepower and types (brushed vs. brushless) -
With brush massage:
It is the more common motor. Its advantages are that it is cheap, starts and brakes quickly, and its horsepower can be very high . However, its disadvantages are its heavy weight and low efficiency . Due to its mature technology, it is easier to build a high-power motorcycle . Brush motors should not be operated at high temperatures , as high temperatures will soften the springs connecting the carbon brushes, and their performance will decrease over time .
Examples of electric wheelchairs with carbon wipers inside the brush:
Most of the time, the electric wheelchair motor has worn out and the user feels powerless. Simply changing the carbon brushes may solve the problem.
It is a motor without a carbon brush for phase change. The advantage is that there is no carbon brush as a current phase changer, so there is no need to clean the loss caused by friction of the carbon brush. Maintenance is simpler, and the service life is higher and longer . Since it does not need to be used Large magnets and coils, so the weight is also lighter and the volume is smaller . Because it is difficult and costly to produce, it is more expensive . In addition , there are not many high-power brushless motors on the market yet.
Generally speaking, the efficiency of brushless massage is about 65-80% , and the efficiency of brushless massage is about 80-90% . For example, with a 20Ah battery, an electric wheelchair with a brush motor can run for 4 hours; on the other hand, an electric wheelchair with a brushless motor can run for 6 hours.
Advantages: cheap, powerful, quick response
Disadvantages: heavy, power-consuming, requires maintenance, will become weak over time
Commonly used for: traditional electric wheelchairs
Advantages: light, durable, energy saving
Disadvantages: Expensive, rare ultra-high-power brushless motors
Commonly used for: new lightweight electric wheelchairs