The carbon fiber can make the contact performance of brush sliding system better and lead to smaller commutation sparks and keep the lubricating film of the engine system in good condition.

• 炭纤维的加入能使电刷滑动系统接触性能变好，从而有效减小电刷换向火花，并促使电机系统的润滑膜保持完好的状态。