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+//Electric Drives:concepts and applications by V.subrahmanyam
+//Publisher:Tata McGraw-Hill 
+//Edition:Second 
+//Ex3_5
+clc;
+clear;
+f=50;//Frequency in Hz
+Rd=2.5;//Resistance in ohm
+Lc=0.005;//Inductance in mH
+Vs=220;//Supply voltage in V
+pf=1;//Powerfactor
+pf1=0.866;//Powerfactor
+Xc=2*%pi*f*Lc;
+Z=Rd+((2*Xc)/%pi);
+Vdia=0.9*Vs*pf;
+Id=Vdia/Z;
+disp(Id,"The average value of load current in A is:")
+Vd=Id*Rd;
+Vdc=Vdia-Vd;
+a=(1-((Vdc*2)/Vdia));
+b=acos(a);
+u=(b*180)/%pi;
+disp(u,"The overlap angle u in deg is:")
+Vdia1=0.9*Vs*pf1;
+Id1=Vdia1/Z;
+Vd1=Id1*Rd;
+Vdc1=Vdia1-Vd1;
+V=pf1-((Vdc1*2)/Vs);
+c=acos(V);
+d=(c*180)/%pi;
+u1=d-30;
+disp(u1,"The overlap angle u1 in deg is:")
+//Result vary due to error in calculation of overlap angle in the textbook