I've read about the eddy current breaks but it's still not clear to me
how to construct one. The wikipedia talks about a rotor connected to a
spinnning coil. I would think the rotor would spin inside a coil.
Then wikipedia talks about using electromagnets and varying the
breaking force by varying the magnetic field.
On Sun, Mar 28, 2010 at 8:03 PM, David C. Kerber
<[1]dker...@warrenrogersassociates.com> wrote:
My bicycle trainer uses an eddy current brake; there are no wires
anywhere in the load; just a ventilated disk and a magnet that I can
move closer or further away from the disk by turning an adjustment
dial.
D
> -----Original Message-----
> From: [2]geda-user-boun...@moria.seul.org
> [mailto:[3]geda-user-boun...@moria.seul.org] On Behalf Of Rob Butts
> Sent: Saturday, March 27, 2010 4:29 PM
> To: gEDA user mailing list
> Subject: gEDA-user: Magnetic bike operation
>
> I'm having a debate with an ee friend about how the magnetic
> resistance works on an excersice bike.
>
> It occurred to me this would be the best place to solve it.
>
> Does anyone know if it is simply an electro-magnet close to a
> metal wheel where the stronger the magnetic field the
> stronger the resistance? Or is it alternating magnets in a
> flywheel type configuration with a toriodal coil surrounding
> the flywheel and a variable resistance in the coil circuit
> resists the induced current providing the resistance to user
> who would be spinning the flywheel? (Sorry if I didn't
> describe that well).
>
> Or is it something completely different?
>
> Thanks
>
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References
1. mailto:dker...@warrenrogersassociates.com
2. mailto:geda-user-boun...@moria.seul.org
3. mailto:geda-user-boun...@moria.seul.org
4. mailto:geda-user@moria.seul.org
5. http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
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