- #1
PlickPlock
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Using an eddy current brake, one would expect the damping constant ##δ## to increase with the current ##I## supplied to the eddy current brake. My question is, why is ##δ## proportional to ##I^2## and not merely ##I##?
The magnitude of the eddy current is ##\frac{1}{R}\frac{dΦ}{dt}##, which is why I initially thought ##δ## was proportional to ##I##, because the induced current is proportional to ##\frac{dΦ}{dt}##.
P.S: This link http://home.uni-leipzig.de/prakphys/pdf/VersucheIPSP/Mechanics/M-17E-AUF.pdf
was what I used as reference; it stated the relation but does not seem to explain why.
The magnitude of the eddy current is ##\frac{1}{R}\frac{dΦ}{dt}##, which is why I initially thought ##δ## was proportional to ##I##, because the induced current is proportional to ##\frac{dΦ}{dt}##.
P.S: This link http://home.uni-leipzig.de/prakphys/pdf/VersucheIPSP/Mechanics/M-17E-AUF.pdf
was what I used as reference; it stated the relation but does not seem to explain why.