A brushless DC fan is a fan that uses brushless DC motor technology. Compared with traditional DC fans, brushless fans have higher efficiency, longer service life and lower noise levels.

A brushless DC motor is a motor that uses electronic commutation technology, an electronic controller and blades. The brushless DC motor drives the fan blades to generate airflow through a rotating rotor. The electronic controller is responsible for controlling the speed and operating state of the motor to meet specific air volume and pressure requirements.

Brushless DC fans are widely used in many applications, including computer cooling, electronic equipment cooling, industrial ventilation and air conditioning systems, etc. Due to their high efficiency, quietness and reliability, brushless DC fans have become the first type of fans in many fields.

In summary, a brushless DC fan is a fan that uses brushless DC motor technology. It has the advantages of high efficiency, quietness and reliability, and is widely used in many fields.