- #1
D.B0004
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Homework Statement
Consider the core of dimensions given in example 5-1. A coil requires an inductance of 23.6μH, a maximum current of 4A is allowed, and flux density is not to exceed 1.3T. Calculate the required relative permeability, μr, of the magnetic material that should be used.
(HINT: You will need to consider N, the number of turns on the core. Compute this first, and use the result to find µr)
Homework Equations
Lm = N^2/R
Bm = μm*N^2/lm
gamma = N*PHI
PHI = N*i/Rm
PHIm = Bm*Am
The Attempt at a Solution
I can solve the solution IF I can solve for N, the number of turns in the core. I cannot find a way to do this. Can anyone point me in the right direction? Am I missing an equation? I've read thru class notes and our book (Electric Machines and Drives - Ned Mohan) and cannot find something that would lead to N. Thanks!