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.

A brushless motor controller is an electronic device used to control and drive the operation of a brushless motor. It controls the speed, direction, start stop and other operations of the motor through electrical signals, and is widely used in fields such as automobiles, drones, and industrial automation.

Planetary reducer is a high-precision deceleration device commonly used in mechanical transmission, which decelerates the rotation of the input shaft and transmits it to the output shaft, thereby reducing the speed of the output shaft. This deceleration method mainly utilizes the transmission coordination between the planetary gear, the sun gear, and the planetary gear shaft, which has a strong deceleration ratio and transmission ability.