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On Wed, Sep 21, 2011 at 11:45:17AM -0400, Rob Butts wrote: > > I'd like to order material to start prototyping. I would like to be able to > calculate approximate torques for given size disks of aluminum or copper and > approximate size, quantity and strength of magnets mounted to a disk a given > proximity away. Does anyone know the theorey and how I would try to model > this to calculate the variables and purchase materials to begin a > prototype? Or refer me to a source covering the theory? > This is touched on in first- and second-year physics, so any elementary text on electromagnetism should talk about it. However, there is not a lot of quantitative information known about this, since the paths of the specific eddy currents aren't very predictable. I had a homework assignment about this last year that made some (very) questionable assumptions to get an idea of the torque involved, which you might find instructive nonetheless. I have my answer, but can't find the original question, unfortunately..I'll have to ask the prof. -- Andrew Poelstra Email: asp11 at sfu.ca OR apoelstra at wpsoftware.net Web: http://www.wpsoftware.net/andrew
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