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+// Electric Machinery and Transformers
+// Irving L kosow 
+// Prentice Hall of India
+// 2nd editiom
+
+// Chapter 9: POLYPHASE INDUCTION (ASYNCHRONOUS) DYNAMOS
+// Example 9-16
+
+clear; clc; close; // Clear the work space and console.
+
+// Given data
+// three-phase SCIM
+V = 208 ; // Rated voltage in volt
+P_o = 15 ; // Rated power in hp
+I = 42 ; // Rated current in A
+I_st = 252 ; // Starting current in A
+T_st = 120 ; // Full-voltage starting torque in lb-ft
+tap = 60*(1/100) ; // Tapping in % employed by compensator
+
+// Calculations
+// case a
+I_sm = tap * I_st ; // Motor starting current in A at reduced voltage 
+
+// case b
+I_L = tap * I_sm ; // Motor line current in A(neglecting tarnsformer exciting 
+// current and losses)
+
+// case c
+T_s = (tap)^2 * T_st ; // Motor starting torque at reduced voltage in lb-ft
+
+// case d
+percent_I_L = I_L / I_st * 100 ; // Percent line current at starting
+
+// case e
+percent_T_st = T_s / T_st * 100 ; // Percent motor starting torque
+
+// Display the results
+disp("Example 9-16 Solution : ");
+
+printf(" \n a: Motor starting current at reduced voltage : ");
+printf(" \n    I_sm = %.1f A to the motor.\n",I_sm);
+
+printf(" \n b: Motor line current neglecting tarnsformer exciting current and losses :");
+printf(" \n    I_L = %.2f A drawn from the mains.\n",I_L);
+
+printf(" \n c: Motor starting torque at reduced voltage :\n    T_s = %.1f lb-ft\n",T_s);
+
+printf(" \n d: Percent line current at starting : ");
+printf(" \n    = %.f percent of line current at full voltage.\n",percent_I_L);
+
+printf(" \n e: Percent motor starting torque : ");
+printf(" \n    = %d percent of starting torque at full voltage.\n",percent_T_st);