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+// Electric Machinery and Transformers
+// Irving L kosow 
+// Prentice Hall of India
+// 2nd editiom
+
+// Chapter 14: TRANSFORMERS
+// Example 14-2
+
+clear; clc; close; // Clear the work space and console.
+
+// Given data
+V_h = 2300 ; // high voltage in volt
+V_l = 115 ; // low voltage in volt
+V_1 = 2300 ; // Primary voltage in volt
+V_2 = 115 ; // Secondary voltage in volt
+f = 60 ; // Frequency in Hz
+S = 4.6 ; // kVA rating of the step-down transformer
+S_1 = S ; 
+S_2 = S ;
+V_per_turn = 2.5 ; // Induced EMF per turn in V/turn
+// Ideal transformer
+
+// Calculations
+// case a
+N_h = V_h / V_per_turn ; // Number of high-side turns
+N_l = V_l / V_per_turn ; // Number of low-side turns
+
+N_1 = N_h;// Number of turns in the primary
+N_2 = N_l;// Number of turns in the secondary
+
+// case b
+I_1 = S_1*1000 / V_1 ; // Rated primary current in A
+I_2 = S_2*1000 / V_2 ; // Rated secondary current in A
+
+I_h = 2 ; // Rated current in A on HV side
+I_l = 40 ; // Rated current in A on LV side
+
+// case c
+// subscript c for alpha_stepdown and alpha_stepup indicates case c
+alpha_stepdown_c = N_1 / N_2 ; // step-down transformation ratio
+alpha_stepup_c = N_l / N_h ; // step-up transformation ratio
+
+// case d
+// subscript d for alpha_stepdown and alpha_stepup indicates case d
+alpha_stepdown_d = I_2 / I_1 ; // step-down transformation ratio
+alpha_stepup_d = I_h / I_l ; // step-up transformation ratio
+
+// Display the results
+disp("Example 14-2 Solution : ");
+
+printf(" \n a: Number of high-side turns :\n    N_h = %d t = N_1 \n",N_h);
+printf(" \n    Number of low-side turns :\n    N_l = %d t = N_2\n",N_l);
+
+printf(" \n b: Rated primary current :\n    I_h = I_1 = %d A \n",I_1);
+printf(" \n    Rated secondary current :\n    I_l = I_2 = %d A\n",I_2);
+
+printf(" \n c: step-down transformation ratio :\n    α = N_1/N_2 = %d\n",alpha_stepdown_c);
+printf(" \n    step-up transformation ratio :\n    α = N_l/N_h = %.2f\n",alpha_stepup_c);
+
+printf(" \n d: step-down transformation ratio :\n    α = I_2 / I_1 = %d\n",alpha_stepdown_d);
+printf(" \n    step-up transformation ratio :\n    α = I_h / I_lh = %.2f\n",alpha_stepup_d);