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Victor
Junior Member
United Kingdom
413 Posts |
Posted - 30/08/2007 : 02:22:53
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Wow! haaa haa Check all these great posts here!! I`ll have to write all this down!! Tonnes of information here of great use......
THANKYOU GOTWIND FRIENDS SO MUCH! |
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BushWhacker
Junior Member
Canada
329 Posts |
Posted - 30/08/2007 : 08:25:26
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ummm ... Victor, why don't you just open a new folder with WORD or Notepad, then copy & paste all the posts that you want and save them to My Documents? You are welcome if I helped.
Cheers!
BW
Everything should be made as simple as possible, but not one bit simpler. - Albert Einstein |
Edited by - BushWhacker on 30/08/2007 08:33:12 |
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Del
Junior Member
United Kingdom
369 Posts |
Posted - 30/08/2007 : 09:27:07
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Hi BW,
Negative earth on UK cars - in fact I think that's right for the whole world now. Many many years ago we had positive earth but that's long gone.
Cheers
Del. |
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BushWhacker
Junior Member
Canada
329 Posts |
Posted - 30/08/2007 : 18:59:06
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"Many many years ago we had positive earth but that's long gone."
I guess I got that from working on some vintage MG's. when they werent all that old Next you are going to tell me that Lucas has got their electrical systems sorted out?
I guess I'm dating my self now. Gotwind has to get a fossil avatar just for me.
Cheers!
BW
Everything should be made as simple as possible, but not one bit simpler. - Albert Einstein |
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Peter Williams
New Member
United Kingdom
54 Posts |
Posted - 01/09/2007 : 12:43:19
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| I understand about 1% of this but I have plans that use 2 dynohub, one at the top and one at the bottom of a savonius design. Since these are running exactly at the same speed would this make it possible to be a good 12v charger without power loss |
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ll81
Junior Member
124 Posts |
Posted - 01/09/2007 : 15:38:06
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That will work well. Still give each dyno hub it's own bridge rectifier and parallel the outputs.
woo-hoo |
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gotwind
Forum Admin
United Kingdom
949 Posts |
Posted - 01/09/2007 : 19:02:53
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Hi Peter.
I have seen those plans a few years ago and made a very poor effort in making a dual dynohub sav vawt.
The cogging doubles up so it needs a good sized diameter and good wind to work.
II81 is correct, both dynohubs need separate bridge rectification.
Use Schottky rectifying diodes - they have a lower forward voltage drop.
Good luck
Ben.
The Futures Green - Getwind of it. |
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Del
Junior Member
United Kingdom
369 Posts |
Posted - 01/09/2007 : 21:21:28
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Is there an issue of rpm here guys? A VAWT is never going to spin particularly fast, but I'm not sure of the cut in speed of a dynohub. You could consider a voltage doubling circuit but thsat will halve the amp output and as dynohubs are not exactly bulging with amperage output you would only get a tiny trickle charge.
Thoughts?
Cheers
Del. |
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fungus
Moderator
299 Posts |
Posted - 01/09/2007 : 21:26:28
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| Del; the dynohubs cut in at 6v at only 60rpm, two in series would make 12v, good match for a vawt if cogging can be overcome. |
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Del
Junior Member
United Kingdom
369 Posts |
Posted - 01/09/2007 : 23:29:36
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Wow, i didn't realize it was only 60rpm - still thinking about it it wouldn't be much use if you had to get them up to Tour de France speeds to get them to work would it!
This twin VAWT dynohub project could be interesting. I don't think the cogging wil be a prob. VAWT's should be really torquey.
Cheers
Del. |
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Victor
Junior Member
United Kingdom
413 Posts |
Posted - 02/09/2007 : 06:33:07
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I did a quick video of my Dynohub working last night. See what you think of it. I`m very impressed at the speed of the dynohub in this video.Watch the end of the vidoe and dont run away from your monitor!!
http://uk.youtube.com/watch?v=58oAXvL61io
Here is this going fast?? LOL For a dyno? |
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ll81
Junior Member
124 Posts |
Posted - 02/09/2007 : 10:54:37
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To series two hubs on one shaft will work well. Problem is alignment, both will need to cross over 0v and crest there outputs simultainiously and then wired +-+-. Once aligned they will work fine it's just aligning them.
woo-hoo |
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Victor
Junior Member
United Kingdom
413 Posts |
Posted - 02/09/2007 : 23:10:08
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Can I suggest this as an idea using two dynohubs at the ends?
http://uk.youtube.com/watch?v=WZ5kX5Yw4eY
Could power not just dynaohubs but any other dynamos on the side of it... This would stop the need for blanaced blades if you have the right location for it?
Comments plase? |
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Del
Junior Member
United Kingdom
369 Posts |
Posted - 02/09/2007 : 23:29:47
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Hi Victor,
I can't see your video (the one of your dynohub). I geta youtube message saying "This is a private video. If you have been sent this video, please make sure you accept the sender's friend request".
Cheers
Del.
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Edited by - Del on 02/09/2007 23:33:16 |
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Victor
Junior Member
United Kingdom
413 Posts |
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Topic |
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Ideas for Dynohub charging
