12 Volt Mobile Phone Laptop Cooling Fan

Dc fan design highlights:

At present, brushless DC motor is used in most DC fans. Because the collector ring and brush used in excitation are omitted, the structure is greatly simplified. At the same time, the technology of motor is improved, the mechanical reliability of motor operation is greatly enhanced, and the service life is increased. At the same time, the air gap magnetic density can be greatly improved, and the motor index can achieve good design. The direct effect is that the motor volume is reduced and the weight is reduced. Not only that, compared with other motors, it has very good control performance. Due to the high performance of permanent magnet material, the torque constant, torque inertia ratio and power density of the motor are greatly improved. Through reasonable design, the indexes such as moment of inertia, electrical and mechanical time constant are greatly reduced, and the main indexes of servo control performance are greatly improved. The design of permanent magnet circuit is perfect, coupled with the high coercivity of permanent magnet material, so the anti-armature reaction and anti-demagnetization ability of permanent magnet motor are greatly strengthened, and the control parameters of the motor are greatly reduced with the influence of external disturbance. 

The above is the relevant introduction of DC fan, hope to help you.