A lot of people for "Inflatable Air Blower" are not very understanding, in fact, the internal structure of AC fans is composed by two coil windings, one is to start winding, a winding run, these two windings are connected in series, so "Inflatable Air Blower" to form a three-point, the series points common to start winding end run to start winding end end end run, "Inflatable Air Blower" AC motors also need a starting capacitor, usually a capacity of between 1-2uf, pressure typically 250v, which is the normal use of the AC electric motor, this capacitor is polyester capacitors, there is no positive and negative points.