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Build Your Own Wind Generator workshop pictorial essay   Message List  
Reply | Forward Message #6154 of 27210 |

Hi Wind Whackos,

We had a great time here with Hugh Piggott and the Solar Energy
International Build Your Own Wind Generator workshop. We're already
talking about doing it again in the spring of 2003.

Hugh has put together a comprehensive report on the workshop, with
lots of photos. You can find it at:
http://www.ScoraigWind.co.uk/SEIpics

Enjoy,

Ian


--
Ian Woofenden <ian.woofenden@...>
Associate Editor, Home Power magazine
Editors are Professional Idiots - We misunderstand text so our readers won't.

HP subscriptions: $22.50 per year
PO Box 520, Ashland, OR 97520 USA
800-707-6585 (US), 530-475-0830
Or download current issue at <http://www.homepower.com>
Tue Nov 13, 2001 11:04 pm

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Forward 		Message #6154 of 27210 |
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Hi Wind Whackos, We had a great time here with Hugh Piggott and the Solar Energy International Build Your Own Wind Generator workshop. We're already talking... 		Ian Woofenden
ianwoofenden
Offline Send Email 		Nov 13, 2001
11:04 pm

I am contemplating the design of a rather large (about 12 kW), 1 ph, 475 RPM PM disk alternator (to be used in a hydro installation) and am looking for sources...
lforbes@...
Send Email 		Jan 5, 2002
9:13 pm

laurie ... I wonder why you want to use single phase? If you plan to use the power directly as AC, you will find it difficult to regulate the voltage...
hugh piggott
hughpiggott
Offline Send Email 		Jan 6, 2002
12:23 pm

Thanks much Hugh for responding to all those questions. ... The power would be used directly (no batteries). I'm thinking the voltage regulation could be most...
lforbes@...
Send Email 		Jan 7, 2002
11:46 am

... you are welcome ... This sounds OK in theory, so long as you can get the right voltage in the first place. You can adjust the voltage down slightly by...
hugh piggott
hughpiggott
Offline Send Email 		Jan 7, 2002
10:31 pm

... Exactly and that is one of the issues I'm wrestling with - how to get close without having to rebuild the thing. ... Yes - I see this as a big advantage of...
lforbes@...
Send Email 		Jan 8, 2002
6:50 pm

... there is also the question of how much water you have, and the fact that you will not be able to operate at reduced power without tweaking the air gap. ......
hugh piggott
hughpiggott
Offline Send Email 		Jan 8, 2002
10:47 pm

... No? Would not the phases be additive (adding the voltage vectors) with the coils connected in series (similar to using only two terminals of a 3 ph Y ...
lforbes@...
Send Email 		Jan 8, 2002
11:33 pm

... SO, if I want the most out of my magnet $ I should space them out more and use the largest possible rotor? (within reason). If so then should the coils be...
Ken Lawton
ken11487
Offline Send Email 		Jan 8, 2002
3:43 am

... Or just put more copper in each coil. More turns or thicker wire. ... Lams are not that big a power drain at low power/speed but they are a hassle (big...
hugh piggott
hughpiggott
Offline Send Email 		Jan 10, 2002
7:23 pm

... you can add them in series, but the voltage they will produce then will be only 71 % of the sum of their individual voltages, due to the phase shift. So...
hugh piggott
hughpiggott
Offline Send Email 		Jan 9, 2002
8:49 am

... Yes - the resultant voltage would be (1+1)^0.5 or 1.41 volts if each phase was 1 volt. My thought was that by layering two winding sets, similar to the...
lforbes@...
Send Email 		Jan 9, 2002
6:42 pm

... As an alternative to having a disk cut, try using a plate sprocket with a weld-on hub. They are available at all power transmission supply stores. ...
Doug
tolopo_ca
Offline Send Email 		Jan 10, 2002
2:49 pm

... Hi Doug: I've considered using such sprockets (Princess Auto was where I bought four of 'em to gear up my 12' prop to power a PMA at around 1400 rpm) but...
lforbes@...
Send Email 		Jan 10, 2002
5:25 pm

... the end result would be similar. ... no it is really beautiful. Buy the book. Or arthur's one might do. ... For direct AC the induction motor would...
hugh piggott
hughpiggott
Offline Send Email 		Jan 10, 2002
7:01 pm

correction ... I made a mistake here. Since we were talking volts per turn, 1.4 would mean a higher flux density than 1.08. ... But this part holds good. The...
hugh piggott
hughpiggott
Offline Send Email 		Jan 10, 2002
10:49 pm

... Hugh: I'm not sure I follow - I originally mentioned a trial setup with *three* magnets (oriented as N S N polarity) and a single coil mounted on a solid ...
lforbes@...
Send Email 		Jan 11, 2002
4:51 am

... I'm going to have to start paying attention. Three magnets is a waste of time. Magnet come in pairs. Sorry. Try with 2 or 4 magnets. Solid metal disk...
hugh piggott
hughpiggott
Offline Send Email 		Jan 11, 2002
8:11 pm

The notion of using coiled sheet metal iron for lams in a disk alternator seems like a good idea but suitable material is apparently not available in long...
lforbes@...
Send Email 		Jan 12, 2002
3:28 am

... Why for a hydroelectric turbine do you need to produce a special alternator? Couldn't a standard induction motor and water turbine rpm be specified that ...
Jon Powers
calwind@...
Send Email 		Jan 9, 2002
4:32 pm
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