Brushless DC motors, also referred to as BLDC motors, offer many advantages over their brushed counterparts. BLDC motors provide higher efficiency and require lower maintenance, which is why they have replaced brushed motors in many applications.

Both types of motors operate based on a similar principle, in which the rotational motion is generated through the attraction and repulsion of magnetic poles of permanent and electromagnets. However, the way these motors are controlled is very different. BLDCs require a complex controller to convert a single DC power to three-phase voltage, whereas a brushed motor can be controlled by regulating the DC voltage.

Brushed DC motors

• High maintenance due to worn brushes
• Low efficiency
• Easy control (DC voltage)