"220V AC Cooling Fan" includes a variety of types, according to their different functional applications can be divided into different categories. Today we are talking about different ways according to the power supply, the DC motor has two types of seed exchange. Computer use of "220V AC Cooling Fan" for the DC motor, the supply voltage is + 12V, the rotational speed between 1000 and 10,000 rev / min. DC is direct current into mechanical rotating machinery. It consists of a stator, a rotor and a commutator of three parts, a stator (i.e., the main magnetic pole) is fixed to the "220V AC Cooling Fan" stent, is a non-rotating part of the motor. More than two rotor coil winding made from enameled wire, called windings. Generates a magnetic field when a current passes through the windings, the role of the stator magnetic field generating power. Since the stator is fixed, so the rotor is rotated under the action of forces.