"Micro Cooling Fan" is the use of magnetic force of the rotor is suspended in the air, so that there is no mechanical contact between the rotor and the stator. The principle is that the magnetic flux lines and the maglev line perpendicular to the axis of the core with the magnetic lines are parallel, so the weight of the rotor is fixed on the running track, the axis "Micro Cooling Fan" use almost no load to the opposite maglev line direction Top support form the entire rotor suspended on fixed orbits. With the traditional ball bearing, oil bearing compared to the absence of mechanical contact magnetic bearings, "Micro Cooling Fan" rotor can run to a high speed, with a small mechanical wear, low energy consumption, low noise, long life, no lubrication, no oil pollution, etc., especially for high-speed, vacuum, clean, and other special environment.