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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/EX4.7 | |
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initial commit / add all books
Diffstat (limited to '2642/CH4/EX4.7')
| -rwxr-xr-x | 2642/CH4/EX4.7/Ex4_7.sce | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/2642/CH4/EX4.7/Ex4_7.sce b/2642/CH4/EX4.7/Ex4_7.sce new file mode 100755 index 000000000..c63d5b623 --- /dev/null +++ b/2642/CH4/EX4.7/Ex4_7.sce @@ -0,0 +1,34 @@ +// FUNDAMENTALS OF ELECTICAL MACHINES
+// M.A.SALAM
+// NAROSA PUBLISHING HOUSE
+// SECOND EDITION
+
+// Chapter 4 : DIRECT CURRENT GENERATORS
+// Example : 4.7
+
+
+clc;clear; // clears the console and command history
+
+// Given data
+E = 25 // power of compound generator in kW
+V_t = 220 // terminal voltage in V
+R_se = 0.05 // series resistance in ohm
+R_sh = 55 // shunt field resistance in ohm
+R_a = 0.07 // armature resistance in ohm
+brush_drop = 1 // voltage drop per brush in V
+
+// caclulations
+I_L = E*10^3/V_t // load current in A
+I_sh1 = V_t/R_sh // shunt field current in A
+I_a1 = I_sh1+I_L // armature current in A
+E_g1 = V_t+I_a1*(R_a+R_se)+2*brush_drop // generator voltage in V
+V_ab = V_t+I_L*R_se // voltage across the shunt field in V for short shunt generator
+I_sh2 = V_ab/R_sh // current in the shunt field in A for short shunt generator
+I_a2 = I_sh2+I_L // armature current in A for short shunt generator
+E_g2 = V_ab+I_a2*R_a+2*brush_drop // generator voltage in V for short shunt generator
+
+// display the result
+disp("Example 4.7 solution");
+printf(" \n Generated emf when generatar is connected in long shunt \n E_g1 = %.f V \n", E_g1);
+printf(" \n Generated emf when generatar is connected in short shunt \n E_g2 = %.1f V \n", E_g2);
+
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