I don't have the plans. You have to buy them, but I'm assuming it's a symmetrical 5 phase circuit, where the phases are 72° apart. I kinda like these projects, because they have helped me understand polyphase a bit more. But the site for it is http://www.scoraigwind.com/ . I don't think it's an excitation circuit, because it uses permanent magnets. they are small scale, and to use electromagnetic exciting fields would be inefficient, as you would be draining your battery on windless days. (this guy lives on Scoraig Peninsula, Scotland, miles away from civilization. (I'm assuming he would be the AHJ in his area?)