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+// Electric Machinery and Transformers
+// Irving L kosow 
+// Prentice Hall of India
+// 2nd editiom
+
+// Chapter 3: DC Dynamo Voltage Relations - DC Generators
+// Example 3-9
+
+clear; clc; close; // Clear the work space and console.
+
+// Given data
+kW = 60; // Power rating of the generator in kW
+V = 240; //Voltage rating of the generator in V
+I_f = 3; // Increase in the field current in A
+OC_V = 275; // Over Compounded Voltage in V
+I_l = 250; // Rated load current in A
+N_f = 200; // No. of turns per pole in the shunt field winding 
+N_s = 5; // No. of turns per pole in the series field winding 
+R_f = 240; //  Shunt field resistance in ohm
+R_s = 0.005; //  Series field resistance in ohm
+
+// Calculations
+deba_I_f_N_f = I_f * N_f; 
+I_s_N_s = deba_I_f_N_f; // Series field ampere-turns
+I_s =( I_s_N_s ) / N_s; // Desired current in A in the series field required to
+// produce voltage rise
+I_d = I_l - I_s; // Diverter current in A
+R_d = ( I_s * R_s ) / I_d; // Diverter resistance in ohm
+NL_MMF = ( V / R_f )* N_f; // No-load MMF
+I_f_N_f = NL_MMF;
+FL_MMF = I_f_N_f + I_s_N_s; // Full-load MMF
+
+// Display the result
+disp("Example 3-9 Solution : ")
+printf("\n a: Rd = %.5f ohm ", R_d );
+printf("\n b: No-load MMF = %d At/pole ", NL_MMF );
+printf("\n    Full-load MMF = %d At/pole ", FL_MMF );