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][email protected]> 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][email protected] > [mailto:[3][email protected]] 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 > _______________________________________________ geda-user mailing list [4][email protected] [5]http://www.seul.org/cgi-bin/mailman/listinfo/geda-user References 1. mailto:[email protected] 2. mailto:[email protected] 3. mailto:[email protected] 4. mailto:[email protected] 5. http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
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