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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/CH5/EX5.6 | |
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initial commit / add all books
Diffstat (limited to '2642/CH5/EX5.6')
| -rwxr-xr-x | 2642/CH5/EX5.6/Ex5_6.sce | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/2642/CH5/EX5.6/Ex5_6.sce b/2642/CH5/EX5.6/Ex5_6.sce new file mode 100755 index 000000000..ab90e80b9 --- /dev/null +++ b/2642/CH5/EX5.6/Ex5_6.sce @@ -0,0 +1,32 @@ +// FUNDAMENTALS OF ELECTICAL MACHINES
+// M.A.SALAM
+// NAROSA PUBLISHING HOUSE
+// SECOND EDITION
+
+// Chapter 5 : DIRECT CURRENT MOTORS
+// Example : 5.6
+
+clc;clear; // clears the console and command history
+
+// Given data
+I_L1 = 5 // dc shunt motor current
+V_t = 230 // terminal voltage in V
+N_1 = 1000 // speed in rpm
+R_a = 0.2 // armature resistance in ohm
+R_F = 230 // field resistance in ohm
+I_L2 = 30 // dc shunt motor current
+
+// caclulations
+// at noload condition
+I_sh = V_t/R_F // shunt field current in A
+I_a1 = I_L1-I_sh // armature current in A
+E_b1 = V_t-I_a1*R_a // back emf in V
+// under load condition
+I_a2 = I_L2-I_sh // armature current in A
+E_b2 = V_t-I_a2*R_a // back emf in V
+N_2 = (E_b2/E_b1)*N_1 // motor speed under load condtion in rpm
+
+// display the result
+disp("Example 5.6 solution");
+printf(" \n Speed under load condition \n N_2 = %.1f rpm \n", N_2 );
+
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