Compared with brushed motors, what are the advantages of brushless motors?

The most common reason is the lifespan.

The lifespan of brushed motors mainly depends on the carbon brush commutator and bearings, while the lifespan of brushless motors mainly depends on the bearings, and most brushless motors use ball bearings.

Although brushed motors can be equipped with oil-containing bearings, most of them still use ball bearings, because even if the bearings are replaced, the problems of carbon brushes and commutators are not solved.

The second is noise. The noise of brushed motors mainly comes from the friction between the carbon brushes and the commutator, and the friction between the output shaft and the bearings, while the noise of brushless motors only comes from the friction between the shaft and the bearings

. And the stability of ball bearings is better than that of oil-containing bearings.

There are also some application requirements, such as anti-electromagnetic interference, environmental protection, such as electric sparks, simple maintenance, more stable products, etc.