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+// Electric Machinery and Transformers

+// Irving L kosow 

+// Prentice Hall of India

+// 2nd editiom

+

+// Chapter 14: TRANSFORMERS

+// Example 14-1

+

+clear; clc; close; // Clear the work space and console.

+

+// Given data for Step -down transformer

+N_1 = 500 ; // Number of turns in the primary

+N_2 = 100 ; // Number of turns in the secondary

+I_2 = 12 ; // Load (Secondary) current in A

+

+// Calculations

+// case a

+alpha = N_1 / N_2 ; // Transformation ratio

+

+// case b

+I_1 = I_2 / alpha ; // Load component of primary current in A

+

+// case c

+// sunscript c for alpha indicates case c

+// For step up transformer , using above given data

+N1 = 100 ; // Number of turns in the primary

+N2 = 500 ; // Number of turns in the secondary

+alpha_c = N1 / N2 ; // Transformation ratio

+

+// Display the results

+disp("Example 14-1 Solution : ");

+

+printf(" \n a: Transformation ratio(step-down transformer) :\n    α = %d\n",alpha);

+

+printf(" \n b: Load component of primary current : \n    I_1 = %.1f A \n",I_1);

+

+printf(" \n c: Transformation ratio(step-up transformer) :\n    α = %.1f",alpha_c);