The working principle of brushless motor

Brushless DC motor is the use of semiconductor switching devices to achieve electronic commutation, that is, electronic switching devices to replace the traditional contact commutator and brush. It has the advantages of high reliability, no reversing spark, low mechanical noise, and is widely used in high-grade recording booth, video recorder, electronic instrument and automatic office equipment. Brushless DC motor is composed of permanent magnet rotor, multipole winding stator, position sensor and so on. Position sensor according to the change of the rotor position, along a certain order of the stator winding current change (that is, detect the rotor magnetic pole relative to the stator winding position, and generate position sensor signal at the determined position