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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/CH4/EX4.11 | |
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Diffstat (limited to '2642/CH4/EX4.11')
| -rwxr-xr-x | 2642/CH4/EX4.11/Ex4_11.sce | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/2642/CH4/EX4.11/Ex4_11.sce b/2642/CH4/EX4.11/Ex4_11.sce new file mode 100755 index 000000000..57707d495 --- /dev/null +++ b/2642/CH4/EX4.11/Ex4_11.sce @@ -0,0 +1,30 @@ +// FUNDAMENTALS OF ELECTICAL MACHINES
+// M.A.SALAM
+// NAROSA PUBLISHING HOUSE
+// SECOND EDITION
+
+// Chapter 4 : DIRECT CURRENT GENERATORS
+// Example : 4.11
+
+clc;clear; // clears the console and command history
+
+// Given data
+P = 4 // number of poles
+I_L = 25 // generator delivering current in A
+V_t = 230 // generator terminal voltage in V
+R_a = 0.2 // armature resistance in ohm
+R_sh = 55 // shunt field resistance in ohm
+brush_drop = 1 // brush drop in V
+
+// caclulations
+I_sh = V_t/R_sh // shunt field current in A
+I_a = I_L+I_sh // armature current in A
+E_g = V_t+I_a*R_a+brush_drop // induced voltage in V
+P_arm = E_g*I_a // power generated in armature in W
+P_L = V_t*I_L // power absorbed by load in W
+n = (P_L/P_arm)*100 // efficiency
+
+// display the result
+disp("Example 4.11 solution");
+printf(" \n Induced voltage \n E_g = %.1f V \n", E_g );
+printf(" \n Efficiency \n n = %.1f percent \n", n );
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