"Tiny Cooling Fan" internal structure is composed of two coil winding, one start winding, a running winding, two winding are connected in series, thus forming the three points, the series points common to start winding end To start the server running winding end run end, "Tiny Cooling Fan" AC motors also need a starting capacitor, usually a capacity of between 1-2uf, pressure is usually 250v, which refers to the normal use of mains AC motor, which Species capacitors are polyester capacitors, no positive and negative points, there are two connectors, one connected to the winding starting end, one connected to the end of the winding operation, the formation of triangle, "Tiny Cooling Fan" power supply (no need to distinguish Fire Wire zero line) one by the end of the run winding (ie and a capacitor are connected together), and the other end connected to the common grounding line to pick up the motor housing;