Re: gEDA-user: Magnetic bike operation

["David C. Kerber" <dkerber@xxxxxxxxxxxxxxxxxxxxxxxxxx>]

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: geda-user-bounces@xxxxxxxxxxxxxx 
> [mailto:geda-user-bounces@xxxxxxxxxxxxxx] 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
geda-user@xxxxxxxxxxxxxx
http://www.seul.org/cgi-bin/mailman/listinfo/geda-user