With the continuous development of technology, brushless motors, as efficient, low noise, and longer lifespan motors, are gradually replacing traditional brushless DC and AC motors. Is profoundly changing people's way of life and work.

A brushless DC motor is a synchronous motor whose rotor is composed of magnets and rotates by controlling the current on the stator. BLDC motors do not have brushes or brush rings, and the magnets on the rotor are controlled by electronic components. Therefore, BLDC motors have the advantages of high efficiency, high reliability, and low noise.

Recently, brushless motor controllers have been widely used in various fields, and their characteristics such as high efficiency, low noise and reliability are favored. This paper introduces the structure principle and characteristics of brushless motor controller.