Brushless direct current motor (BLDCM) overcomes the congenital defects of BLDCM and replaces mechanical commutator with electronic commutator. Therefore, BLDCM not only has the characteristics of good speed regulation performance of DC motor, but also has the advantages of simple structure, no commutation spark, reliable operation and easy maintenance of AC motor. The essence of Brushless DC motor is a three-phase AC permanent magnet synchronous motor with rotor position feedback, which uses electronic inverter to convert DC into AC.

The advantages of BLDC are no carbon brush and long service life. BLDC uses electronic commutation to replace the carbon brush, so as to improve the service life of the motor. It is higher than the traditional efficiency and greatly improves the service life and reliability of the product. The control mode of BLDC is relatively unified. Using six MOSFETs to build a full bridge circuit, because motor drive is a big industry, so the major semiconductor companies have mature solutions.