- Better torque speed characteristics.
- High speed dynamic response;
- High efficiency;
- Long life;
- Low noise;
- High speed.
1.brushless DC motor structure and basic working principle
Brushless DC motor is a kind of synchronous motor, which means that the magnetic field produced by its stator and rotor is the same frequency, so the brushless DC motor will not produce the frequency difference phenomenon of ordinary induction motor. Brushless DC motor also has single phase and 2 phases.
The difference between 3 phase motors determines the number of stator winding windings. Here we will focus on the most widely used 3 phase brushless DC motor.
The stator of brushless DC motor is made of many silicon steel sheets by overlapping and axial stamping. There are certain coils in each punching slot. Traditionally, the stator of brushless DC motor is similar to the stator of induction motor, but there are some differences in the distribution of stator windings. Most brushless DC motors have three windings arranged in a row of stars. Each winding is composed of a number of internally bonded steel sheets in a certain way. Even number of windings are distributed around the stator to form even number of poles.