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+// Calculating the specific iron loss

+clc;

+disp('Example 3.12, Page No. = 3.35')

+// Given Data

+Bm = 1.0;// Maximum flux density in Wb per meter square

+f = 100;// Frequency in Hz

+t = 0.3*10^(-3);// Thickness of sheet in mm

+p = .5*10^(-6);// Resistivity of alloy steel in ohm*meter

+D = 7650;// Density in kg per meter cube

+pi_quoted = 1.2;// Quoted iron loss in W per Kg

+// Calculation of total iron loss

+S1 = 2*12;// Sides of hysteresis loop in A/m

+S2 = 2*1;// Sides of hysteresis loop in Wb per meter square

+A = S1*S2;// Area of hysteresis loop in W-s per meter cube

+ph_each = A;// Hysteresis loss in each cycle in Joule per meter cube

+ph = ph_each*f/D;// Hysterseis loss in W per Kg

+pe = %pi*%pi*f*f*Bm*Bm*t*t/(6*p*D);// Eddy current loss in W per Kg

+pi = pe+ph;// Total iron loss in W per Kg

+disp(pi,'Specific iron loss(W per Kg)=');

+disp('The calculated iron loss is smaller than the quoted.')

+//in book answer is 1.014 W per Kg.  The answers vary due to round off error