As others have said, the Diode allows a current flow in one direction only. That is important when connected to a DC system. I have never seen inside a wind generator
, but more than likely, the generator is producing Alternating current. A DC generator is usually large and requires brushes
. This would have greater friction, thus not turn as easily in light air and are bulky and often heavy. An AC generator can be made very small, especially with the use of strong neodynium magnet material avalaible today. But this Alternating current must be rectified to DC, or your batteries will be fed AC. The Diode will also isolate the Battery
supply from the Alternator
, thus stopping it from spinning as a motor
. The diode is most likely a bridge rectifier of some type. It is also possible that the diode has a voltage regulator
, unless this is done via a seperate charge control device. A bridge rectifier can easily be obtained from your "radio shack" (I think you call them)type store. Make sure it is able to handle a current in excess of what the geny can produce. As most rectifiers are of reasonable high volatage, I don't think you need to consider that part.
The biggest trick is finding a rectifier that will fit into where it has to go. But do remember, it can go outside the geny. You can feed the AC supply all the way to the destination
, and then connect a diode and charge controller at that point.
Hope that helps,
Wheels (I have an electronics
back ground if you want to ask anymore questions)