"Micro Cooling Fan" and the traditional ball bearing, oil bearing compared to the absence of mechanical contact magnetic bearings, rotors 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. Maglev in fact only an auxiliary function, "Micro Cooling Fan" is not independent bearing forms, specific application forms have with other bearings, such as magnetic levitation + ball bearing, magnetic + oil bearing, magnetic bearings, etc. + vaporization. There is also a bearing we have to mention that the main magnetic bearing mute. The use of magnetic force of the magnetic bearing 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 roof support, let into the entire rotor vacant.