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+//Ex 3.16 page 128
+
+clc;
+clear;
+close;
+
+n=3;// no. of phase
+Vs=400;// V
+f=50;// Hz
+Ls=5/1000;// H
+Io=20;// A
+Ri=1;// ohm
+Vdc=400;// V
+
+Vo=Vdc+Io*Ri;// V
+// Vo=3*Vm/%pi*cos(alpha*%pi/180)-3*2*%pi*f*Ls/%pi*Io
+Vm=sqrt(2)*Vs;// V
+alpha=acos((Vo+3*2*%pi*f*Ls/%pi*Io)/(3*Vm/%pi))*180/%pi;// degree
+
+// Vo=3*Vm/%pi*cos((alpha+mu)*%pi/180)-3*2*%pi*f*Ls/%pi*Io
+mu=acos((Vo-3*2*%pi*f*Ls/%pi*Io)/(3*Vm/%pi))*180/%pi-alpha;// degree
+printf('\n Firing angle = %.2f degree',alpha)
+printf('\n Overlap angle = %.2f degree',mu)
+// ans in the textbook is not accurate.