Brushed or Brushless Motors?
And that exactly will become a million dollar question when you go hunting for an electric bike. Differences can be explained but what remains important is to understand those differences. This blog will help you out.
To understand a motor, one need not be a major in rocket science. Because it's that simple! Magnetic flux lines, produced by charged magnets, cut by a rotating coil, produces an Electro-motive force (EMF) which provides output torque. Now if you know motor, then you should also know that a motor and a generator can be used as both reversibly. Thus a motor can be used as a generator and a generator can be used as a motor. Now in a generator, the winding coils are attached to "slip rings" and these slip rings are pressed against brushes. The function of these brushes is to collect output current and provide it to output load resistance. This is in generator. But in a motor, they do exactly opposite. Here they provide current to the assembly.
By now you must know that brushes are pressed against slip rings are these slip rings are constantly rotating. So friction between these two will cause loss due to heat. This means loss in output torque. This again means loss in efficiency. This in turn means reduction in the coverable distance.
And that's where brushless motors come into the picture. Here, no brush means no friction, which means no heat loss, which in turn means no loss in torque. This means no loss in efficiency. Thus you can cover more distance. Technically speaking, 30% more efficiency can be obtained and hence 30% more distance can be covered. Basically, they are microprocessor controlled. A microprocessor reads where the motor is and tells the next electromagnet to push it along and that too without any loss.
And that's why we recommend brushless motors for your E-bike!
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