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| author | priyanka | 2015-06-24 15:03:17 +0530 |
|---|---|---|
| committer | priyanka | 2015-06-24 15:03:17 +0530 |
| commit | b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b (patch) | |
| tree | ab291cffc65280e58ac82470ba63fbcca7805165 /2642/CH7/EX7.4/Ex7_4.sce | |
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initial commit / add all books
Diffstat (limited to '2642/CH7/EX7.4/Ex7_4.sce')
| -rwxr-xr-x | 2642/CH7/EX7.4/Ex7_4.sce | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/2642/CH7/EX7.4/Ex7_4.sce b/2642/CH7/EX7.4/Ex7_4.sce new file mode 100755 index 000000000..42025d507 --- /dev/null +++ b/2642/CH7/EX7.4/Ex7_4.sce @@ -0,0 +1,29 @@ +// FUNDAMENTALS OF ELECTICAL MACHINES
+// M.A.SALAM
+// NAROSA PUBLISHING HOUSE
+// SECOND EDITION
+
+// Chapter 7 : THREE-PHASE INDUCTION MOTOR
+// Example : 7.4
+
+clc;clear; // clears the console and command history
+
+// Given data
+f = 50 // frequency in Hz
+P = 8 // number of poles
+a = 0.03 // full load slip
+R_2 = 0.01 // rotor resistance in ohm
+X_2 = 0.1 // standstill resistance in ohm
+
+// caclulations
+N_s = 120*f/P // synchronous speed in rpm
+s = R_2/X_2 // slip at maximum torque
+N_l = (1-s)*N_s // rotor maximum speed in rpm
+T = (2*a*s)/(s^2+a^2) // ratio of full load torque to maximum torque
+T_ratio = 1/T // ratio of maximum torque to full load torque
+
+// display the result
+disp("Example 7.4 solution");
+printf(" \n Rotor speed at maximum torque \n N_l = %.0f rpm \n", N_l);
+printf(" \n Ratio of maximum torque to full load torque \n T_ratio = %.2f \n", T_ratio);
+
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