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+//CHAPTER 10- THREE-PHASE INDUCTION MACHINES
+//Example 4
+
+disp("CHAPTER 10");
+disp("EXAMPLE 4");
+
+//VARIABLE INITIALIZATION
+r2=0.2;                        //in Ohms
+X2=2;                          //in Ohms
+
+//SOLUTION
+s_m=r2/X2;
+
+//solution (a)
+s=1;
+ratio1=2/((s/s_m)+(s_m/s));    //ratio of T_starting and T_max
+ratio2=2*ratio1;               //ratio of T_starting and T_full-load (T_max=2*T_full-load)
+disp(sprintf("(a) If the motor is started by direct-on-line starter, the ratio of starting torque to full load torque is %f",ratio2));
+
+//solution (b)
+ratio3=(1/3)*ratio2;           //In star-delta starter, T_starting=(1/3)*T_starting_of_DOL
+disp(sprintf("(b) If the motor is started by star-delta starter, the ratio of starting torque to full load torque is %f",ratio3));
+
+//solution (c)
+ratio4=0.7*2*ratio2;           //due to 70% tapping
+disp(sprintf("(c) If the motor is started by auto-transformer, the ratio of starting torque to full load torque is %f",ratio4));
+
+//END  
+