Analysis of an Eddy Current Brake with FEMM
Analysis of an Eddy Current Brake with FEMM
Analysis of an Eddy Current Brake with FEMM
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4 eddycurrentbrake.nb<br />
We w<strong>an</strong>t to replace the current sheet by a sinusoidally distributed b<strong>an</strong>d <strong>of</strong> current density. Most <strong>of</strong> the force in <strong>an</strong> eddy current<br />
brake is due to the fundamental, <strong>an</strong>d if we just consider the fundamental, we c<strong>an</strong> make a simulation in <strong>FEMM</strong> that includes<br />
"motion".<br />
Find amplitude <strong>of</strong> the fundamental in a Fourier Series (http://en.wikipedia.org/wiki/Fourier_series) representation <strong>of</strong> the equivalent<br />
current density <strong>of</strong> the PMs in units <strong>of</strong> A/m^2.<br />
There is a + current sheet <strong>of</strong> strenght Hc located at (pp-wm)/2 <strong>an</strong>d a - current sheet located at (pp+wm)/2. The result is in units<br />
<strong>of</strong> A/m^2<br />
In[27]:= Jmag = HHc ∗Cos@β ∗ Hpp −wmL ê2D − Hc ∗Cos@β ∗ Hpp +wmL ê2DL êIntegrate@Cos@βxD^2, 8x, 0, pp
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