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+// FUNDAMENTALS OF ELECTICAL MACHINES 
+// M.A.SALAM 
+// NAROSA PUBLISHING HOUSE 
+// SECOND EDITION
+
+// Chapter 7 : THREE-PHASE INDUCTION MOTOR
+// Example : 7.8
+
+clc;clear; // clears the console and command history 
+
+// Given data
+v_s = 120      // train speed in km/h
+f = 50         // frequency in Hz
+
+// caclulations 
+v_s = 120*1000/(60*60)    // train speed in m/s
+w = v_s/(2*f)             // length of the pole-pitch in m
+
+// display the result 
+disp("Example 7.8 solution");
+printf(" \n Length of the pole-pitch lenear induction motor \n w = %.2f m \n", w );
+
+
+