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PMA for Bike | 4 comments (4 topical, editorial)
Re: PMA for Bike (3.00 / 0) (#1)
by spinningmagnets (velmis1450bc(at)aol(dot)com) on Sat Jul 19th, 2008 at 07:38:33 AM MST
(User Info)

Dear Nick, welcome.

I'm going to assume you're talking about making a "pedal generator" where a bicycle is on a stand, and your pedaling charges a battery? If yes, use "pedal generator" as a search term (look at the right side of this page near the top for "Google search the board"). Its been tried before, and there has to be AT LEAST 100 posts with that subject.

The reason I say that, is because carrying a battery and charging it while you are pedaling down the street would difficult and awkward. If you could make a working PMA from the rear wheel, as soon as it began charging the battery, the "load" would make it very difficult to pedal.

Please don't don't spend any money yet on magnets or wire until you've read more.

I haven't made a PMA yet, but I've been studying here for a year. When the time arrives for me to move where I would be allowed to have a wind-generator, I will exactly copy a working design that matches the type of wind I will have there.

That being said, experimenting with what you have can be fun and very educational, best of luck!



Re: PMA for Bike (3.00 / 0) (#3)
by scott1981 on Tue Jul 22nd, 2008 at 06:58:29 PM MST
(User Info)

Hi and thanks for your quick reply.

Actually, NO I am not trying to make a "pedal generator" though I know what it is. What I am talking about is using the bike's wheels (spokes, structure, etc) to generate electricity in the same way a dynamo would, but without friction. Of course there will be magnetic drag and all that, but no friction. This resembles the Dynamo HUB function, but the only difference is that there would be no need to replace bearings and all that is associated to the normal wear of the hub. Beside I already have a hub, only that I would like to experiment with this PMA prototype...

My system (the one shown in the link in the previous post) already has a battery, it is a SLA (6v 4Ah) which charges very well with the current system, (dynamo hub and charging system), but I would like to have my PMA generate more power than the current 2.4W

I am currently pedaling with a constant load of 6V and 500 mA approx 3W and it feels fine.

Having said all this, do you guys have any idea???

Thanks,

Nick.

[ Parent ]



PMA for Bike | 4 comments (4 topical, 0 editorial)

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