The difference between brushless motor and brushed motor

The difference between brushless motor and brushed motor is whether there are brushes. Brushless motor has no brushes and realizes rotor commutation through electronic controller. It has the advantages of high efficiency, low noise and long life. Brushed motor realizes commutation through the contact between brush and rotor. It has the advantages of simplicity and low cost, but has disadvantages such as friction, wear and brush life.

1. Brushless motor

• (1) The stator of brushless motor adopts multi-phase winding and the rotor is a permanent magnet structure;

• (2) Brushless motor requires rotor position sensor (Hall sensor);

• (3) Low interference, low noise, high efficiency, high speed and low power consumption;

• (4) Brushless motor must require electronic controller;

• (5) Small moment of inertia, fast response speed and smooth operation;

• (6) Good controllability, long life and low maintenance cost.

2. Brushed motor

• (1) The stator of the brushed motor uses a permanent magnet and the rotor is a winding structure;

• (2) The brushed motor does not require a position sensor (Hall sensor);

• (3) High interference, high noise, low efficiency, high friction, and high loss;

• (4) Low output power, low speed, and large moment of inertia;

• (5) High heat generation, poor reliability, low safety, low life, and troublesome maintenance.