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+//Calculate full load speed
+//Chapter 4
+//Example 4.29
+//page 334
+clear;
+clc; 
+disp("Example 4.29")
+V=400;                    //voltage in volts
+f=50;                    //frequency in hertz
+P=4;                    //number of poles
+//r1=(Ts/Tfl)
+r1=1.6;
+//r2=(Tm/Tfl)
+r2=2;
+//r3=(Ts/Tm)=(2*a)/(1+a^2)
+r3=0.8;
+//on solving , we get a=0.04  ,
+a=0.04;
+Sm=0.04;   //slip at maximium torque
+printf("Slip at maximium torque,Sm=%f",Sm)
+Ns=(120*f)/P;            //synchronous speed in rpm
+Nr=Ns*(1-Sm)             //rotor speed in rpm
+//r2=(a^2+Sfl^2)/(2*a*Sfl)
+Sfl=0.01;
+Nr2=Ns*(1-Sfl);
+printf("\nfull load speed,Nr=%drpm",Nr2)