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+//Book Name: Fundamentals of electrical drives by Mohamad A. El- Sharkawi
+//chapter 11
+//example 11.1
+//edition 1
+//publisher and place:Nelson Engineering
+clc;
+clear;
+Kphi=3;                    //constant in Vsec
+Ra=1;                     //resistance in ohm
+La=10;                   //inductance in mH
+V=600;                   //rated voltage of the motor in volt
+Vt=150;                 //starting voltage in volt
+Tl=20;                //constant torque in Nm
+m=6;                  //total moment of inertia in Nm sec^2
+omegaf=(Vt/Kphi)-((Ra*Tl)/Kphi^(2));
+nf=(omegaf*60)/(2*%pi);
+mprintf("\nThe motor speed after 5 sec is %d rpm",nf)
+//The plot obtained in the book is using a simulation software using specific design that is avaliable in the software.In scilab or xcos there is no option to simulate DC shunt motor