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Forum Index : Windmills : Resistance on windmill
| Author | Message | ||||
| caesius Newbie  Joined: 08/01/2009 Location: Posts: 5 |
Right, I've gone and build a turbine following the exact plans on this site. It's sitting in my vice and apart from the blades, tower and electronics it is complete. Just for fun I hooked up some wire from the stator, through three bridge rectifiers and measured the voltages I got. It looks like there's sufficent volts at low rpm but one thing is bothering me; when I short out the two wires there is a lot of resistance all of a sudden on the rotor - is this the resistance that the blades will have to overcome? Because I find it hard to believe ANY sized blades would be able to turn that... |
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GWatPE Senior Member  Joined: 01/09/2006 Location: AustraliaPosts: 2127 |
This is good. This is the brake mode. A battery is not like a short to the windmill. Gordon. become more energy aware |
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Gizmo Admin Group  Joined: 05/06/2004 Location: AustraliaPosts: 5119 |
Gordons right, a battery load is not like a short circuit. In simple terms, as the windmill speeds up from standstill, its output voltage is less than the battery voltage, so the windmill is unloaded and free to spin up faster. Once it is spinning fast enough to reach battery voltage, the battery starts to take a charge, current is flowing and the windmill then starts to feel a load. So it looks like your windmill is working perfectly, you just need a battery to test it properly. 
Glenn The best time to plant a tree was twenty years ago, the second best time is right now. JAQ |
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