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DynOhub
By Jon Miller, Section Homebrewed Electricity Posted on Sat May 29, 2004 at 03:00:38 AM MST
Has any body used one?

I was looking down the road towards my neighbours and saw a really old bike had been thrown away in a ditch. i had a look at the bike and saw it had a dynohub on it. Now I've looked up about them on the web and found out that their rated a 3W 6V @ 60rpm. I've managed 10v from spinning by hand. Has anybody else every used a dynohub for a wind gennie?
The pdf file is of the layout of the dynOhub.
http://www.otherpower.com/images/scimages/576/sagh6.pdf
Jonathan Miller

DynOhub | 6 comments (6 topical)

Re: DynOhub (3.00 / 0) (#6)
by gotwind on Sat Feb 04, 2006 at 11:12:47 AM MST

See my new website - it's all based upon Sturmey Archers excellent Dynohub and how they can be used as wind generators. www.gotwind.org

Thanks
Ben

Re: DynOhub (none / 0) (#1)
by Norm on Sat May 29, 2004 at 06:01:27 AM MST

Why can't I be that lucky?
( :>) Norm.
( :>) Norm

Re: DynOhub (none / 0) (#2)
by mkseps on Sat May 29, 2004 at 09:09:36 AM MST

About 40 years ago, the US Weather Service took two of these devices and mechanically hooked them in parallel for use in remote areas to record weather patterns. These were very reliable alternators that were designed and built in England. Even today, you will find that the engineering is quite remarkable and those design details could be scaled up for greater output.
Gene

Re: DynOhub (none / 0) (#3)
by Zero on Sat May 29, 2004 at 05:35:39 PM MST

Hi, I've built small wind chargers and picopico hydro's from old Dyno hubs, they're almost indistructable but their main downside is that over a certain rpm they dont generate any more power, this is suposedly intentional in the design so when you go zooming down a steep hill on your bike you dont blow the bulbs.
Have fun.
Z

Re: DynOhub (none / 0) (#4)
by mkseps on Sat May 29, 2004 at 06:13:01 PM MST

You are correct in observing the self regulating characteristic of this alternator. What the designers did was to use lamination materials that saturate in the desired power range. Thus, beyond a cetain point, additional rpm's have little additional output. So, they didn't need any dump load. This is a superior design system.

[ Parent ]

Re: DynOhub (none / 0) (#5)
by jbenz0 on Mon May 31, 2004 at 10:11:20 AM MST

http://www.c-realevents.demon.co.uk/steppers/stepmotor.htm
-one of my very favorite sites.

http://www.motherearthnews.com/index.php?page=arc&id=5083

DynOhub | 6 comments (6 topical)

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