> Easier to build: > http://www.otherpower.com:80/wardalt.html Somewhat. Even the minor machining is notionally not needed if glue is good. If. 1 phase design which is fine enough. Stator iron magnetics is a bit primitive but bearable. Lack of control of airgap height due to poor glueing technique is very poor. Using fixed height spacers when clamping and glueing coils would be easy and highly desirable. Russell McMahon > > - > Martin > > > Apptech wrote: >> This is a DIY 500 Watt alternator for wind turbine use - >> major parts are supplied as a kitset, but the value of >> this >> page is to show how little and how much goes into making >> a >> practical real world alternator >> >> http://www.windstuffnow.com/turbine%20kit.pdf >> >> The "how little" is that all it takes is 9 coils each >> with >> 44 turns as a stator between two rotating metal disks >> with 9 >> rare earth magnets stuck on each. How hard can that be? >> [tm]. >> >> The "how much is ... well, look at the page. Weld, grind, >> drill, bolt, burn, scrape, pot, hammer, fibreglass, sand, >> expletives deleted ..., ... . >> Quite a lot of not complex but you-need-to-get-it-right >> work. >> >> Makes you appreciate the slightly smaller capacity >> Chinese >> windmills at about $US250 delivered complete including >> blades, housing and basic mounting. >> >> Note that scaling this down in size by a factor of 10 to >> 100 >> makes it far less challenging, albeit still not without >> its >> joys. >> >> >> >> Russell >> >> >> > > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist