Changed the way ball bearing friction, rolling friction, this approach is more effective in reducing the friction between the bearing surface phenomenon, effectively increasing the "Mini Air Cooling Fan" bearing life, and therefore the radiator longer life. Shortcomings "Mini Air Cooling Fan" is brought more complex process, leading to cost increase, it also brings higher operating noise. 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, "Mini Air Cooling Fan" the axis of magnetic lines are parallel, so the weight of the rotor is fixed on the running track, the use of the spool core is almost no load to the opposite maglev line direction of the top support, let into the entire rotor vacant.