This is an overview of the fan and circuit I used with the same fan type as Rick Friedrich uses in his kit here (http://www.r-charge.net/5-Inch-Brushless-Negative-Energy-Charging-Conversion-Fan-Kit_p_83.html).
He made a video of the wiring etc. but I can't find it anymore. It's not on his channel nor his site.
But anyways, this is a cool fan where you can keep the original coil wires and windings and the thing will be very powerful. Unfortunately these fans don't come cheap. check ebay.
In a later video, I'll show you how to use a simple small fan from any computer power supply and make it a battery charging powerhouse without winding copper wires till your fingers bleed.