How to get to the difference between 220 v AC cooling fan

"220V AC Cooling Fan" basic structure: Rotor: the magnet, the blade and the shaft composition; stators: There silicon steel sheet, coil and bearing components; control circuit: IC induced by the magnet N. S. Pole circuit control via its coil is turned on and generates an internal excitation of the rotor to rotate. Type: axial fans, DC fans. "220V AC Cooling Fan" is mainly composed of four parts,Rotor: the magnet, the blade and the shaft composition;Stator: from silicon, spools and bearing components; "220V AC Cooling Fan" control circuit: IC induced by a magnet; pole circuit control via its coil is turned on and generates an internal excitation of the rotor to rotate.