Benjamin A. Wood submitted a new resource: Permanent Magnet Generators - a Construction guide - Step by Step construction of PMG's (Permanent Magnet Generators) Read more about this resource...
OK, I didn't download to how-to but you can find permanent magnet alternators at reasonable prices. From 1 KW all the way to 100 KW. Just saying it's sometimes easier and perhaps better to buy something that's in the market and has a reliability history. Or build your own if that's your main desire.