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+
+// ELECTRICAL MACHINES
+// R.K.Srivastava
+// First Impression 2011
+// CENGAGE LEARNING INDIA PVT. LTD
+
+// CHAPTER : 6 : SYNCHRONOUS MACHINES
+
+// EXAMPLE : 6.28
+
+clear ; clc ; close ; // Clear the work space and console
+
+
+// GIVEN DATA
+
+
+V = 400;                       // Operating voltage of the Synchronous generator in Volts
+f = 50;                        // Operating Frequency of the Synchronous generator in Hertz
+xd = 12;                      // Direct axis reactances in Ohms
+xq = 5;                       // Quadrature axis reactances in Ohms
+delta = 15;                   // Power(Torque) angle in degree
+p = 2;                        // Number of the poles 
+m = 3;                        // Number of the phase
+
+
+// CALCULATIONS
+
+v = V/sqrt(3);                                          // Rated Phase Votage in Volts
+Ns = (120*f)/p;                                         // Operating speed in RPM
+Ws = (2*%pi*f)/(p/2);                                   // Synchronous speed in radians/s
+T = (3*v^2*sind(2*delta)/(2*Ws))*((1/xq)-(1/xd));       // Developed Torque in Newton-meter
+
+
+// DISPLAY RESULTS
+
+disp("EXAMPLE : 6.28: SOLUTION :-");
+printf("\n (a) Operating speed, Ns = %.f RPM \n",Ns)
+printf("\n (b) Developed Torque , T = %.2f N-m \n",T)