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// To calculate efficiency of transformer
clc;
V_2=200;
I_2=100;
pf=.8;
P_o=V_2*I_2*pf; //power output
P_i=120;
P_c=300;
k=1;
P_L=P_i+k^2*P_c; //total losses
n=1-(P_L/(P_o+P_L)); disp(n*100,'n(%)');
K=sqrt(P_i/P_c); //max efficiency
n_max=1-(2*P_i/(P_o*K+2*P_i)); //pf=.8
disp(n_max*100,'n_max(%)');
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