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+//Book name: Fundamentals of electrical drives by Mohamad A. El- Sharkawi
+//chapter 3
+//example 3.16
+//edition 1
+//publisher and place:Nelson Engineering
+clc;
+clear;
+Vdc=250;
+Vs=208;//line to line ac voltage
+R=3;//system resistance between battery bank and source in ohm
+Beta=122;
+Vmax=(sqrt(2)*Vs)/sqrt(3);
+mprintf("\na.To calculate minimum triggering angle and associated conduction period:")
+alphamin=60-asind(Vdc/(sqrt(3)*Vmax));
+alphamin=ceil(alphamin);
+gama=Beta-alphamin;
+mprintf("\nThe minimum triggering angle is %d degree and the associated time period is %d degree",alphamin,gama)
+mprintf("\nTo compute the average charging current for the minimum triggering angle:")
+VR=Vdc+(((9*Vmax)/(2*%pi))*cosd(alphamin+150));
+l=((9*Vmax)/(2*%pi))*cosd(alphamin+150);
+IRave=VR/R;
+mprintf("\nThe average charging current of minimum triggering angle is %f A",IRave)
+//The answers vary due to round off error