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The DC fan’s pivot is fixed to the motor stator base, ensuring an appropriate gap between the rotor and the stator. Of course, there must be a clearance between the shaft core and the bearings to prevent the shaft core from becoming locked and thus unable to function. In the motor stator structure, some stators generate induced magnetic flux lines between the rotor and the stator once power is applied. The control circuit then drives the fan motor into operation. Therefore, the conventional fan motor architecture requires only one fan blade rotor, one motor stator, and one drive circuit, and operates via the magnetic field induction through the pivot connection between the shaft core and the bearings.
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