AAAC 76C
Large Member
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- LIVING THE DREAM
Well I looked up Eddy Current Brakes and got this:
The braking force of an eddy current brake is exactly proportional to the velocity V, so it acts similar to viscous friction in a liquid. When the conductive sheet is stationary, the magnetic field through each part of it is constant, not changing with time, so no eddy currents are induced, and there is no force between the magnet and the conductor. Thus an eddy current brake has no holding force.
So it looks like BKools will create a higher resistance at a higher speed of rotation of the flywheel = the speed of the roller which is your ground speed.
Couldn't leave it there so I took the covers off of my Turbo unscrewed the moving magnet electric servo and magnets and wound the magnets fully in by hand and refitted them. Got on the bike and put it in my 34/27 and started pedling.
As expected the resistance at very low revs was next to nothing but it didn't take me long to get up to a cadence that I would not be able to sustain (but it was not that high).
Not sure what that tells us though but none the less I learnt a bit about magnetic breaking today as I first assumed it was all to do with attraction and therefore not velocity dependant.
What also crossed my mind is if your flwheel was back to front or the conductive ring had not been fitted the magnets would not create resistance and therefore you would probably max out at the 1200 Watts which is probably the limitation of the BSim algorithmn.
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