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//CHAPTER 6- MAGNETIC CIRCUITS
//Example 1
disp("CHAPTER 6");
disp("EXAMPLE 1");
//VARIABLE INITIALIZATION
lA=17/100; //length of part A in m
l=3/100; //in m
lg=2/1000; //length of air-gap in m
N=1000; //number of turns
AB=10/100; //in m
BC=20/100; //in m
CD=10/100; //in m
I=1; //exciting current in Amperes
murA=1000; //relative permeability of part A
murB=1200; //relative permeability of part B
mu0=4*%pi*10^(-7); //absolute permeability in Henry/m
//SOLUTION
//solution (i)
ar=l*l;
rA=lA/(mu0*murA*ar);
disp(sprintf("(i) Reluctance of part A is %E AT/Wb",rA));
lB=(AB-(l/2))+(BC-l)+(CD-(l/2));
rB=lB/(mu0*murB*ar);
disp(sprintf("Reluctance of part B is %E AT/Wb",rB));
//solution (ii)
lg=2*lg;
murg=1;
rg=lg/(mu0*murg*ar);
disp(sprintf("(ii) Reluctance of the two air gaps is %E AT/Wb",rg));
//solution (iii)
rT=rA+rB+rg;
disp(sprintf("(iii) Total reluctance is %E AT/Wb",rT));
//solution (iv)
mmf=N*I;
disp(sprintf("(iv) MMF is %d AT",mmf));
//solution (v)
totFlux=mmf/rT;
disp(sprintf("(v) Total flux is %E Wb",totFlux));
//solution (vi)
b=totFlux/ar;
disp(sprintf("(vi) Flux density is %f Wb/m^2",b));
//Answers of (v) and (vi) do not match due to calculation mistake in the book
//END
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