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| author | prashantsinalkar | 2017-10-10 12:27:19 +0530 |
|---|---|---|
| committer | prashantsinalkar | 2017-10-10 12:27:19 +0530 |
| commit | 7f60ea012dd2524dae921a2a35adbf7ef21f2bb6 (patch) | |
| tree | dbb9e3ddb5fc829e7c5c7e6be99b2c4ba356132c /3574/CH10/EX10.9/EX10_9.sce | |
| parent | b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b (diff) | |
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initial commit / add all books
Diffstat (limited to '3574/CH10/EX10.9/EX10_9.sce')
| -rw-r--r-- | 3574/CH10/EX10.9/EX10_9.sce | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/3574/CH10/EX10.9/EX10_9.sce b/3574/CH10/EX10.9/EX10_9.sce new file mode 100644 index 000000000..adc960536 --- /dev/null +++ b/3574/CH10/EX10.9/EX10_9.sce @@ -0,0 +1,39 @@ +// Example 10.9
+// Computation of (a) Steady state armature current if a rheostat in the
+// shunt field circuit reduces flux in air gap to 75% of its rated value
+// (b) Steady state speed for the conditions in (a)
+// Page No. 421
+
+clc;
+clear;
+close;
+
+// Given data
+Rf=160; // Field resistance
+VT=240; // Rated voltade of the machine
+IT=37.5; // Total current
+Ra=0.213; // Armature resistance
+Rip=0.092; // Resistance of interpolar winding
+Rcw=0.065; // Resistance of compensating windings
+n1=2500; // Rated speed of the machine
+
+
+// (a) At rated conditions
+
+If=VT/Rf; // Field current
+Ia1=IT-If; // Armature current
+Ia2=Ia1*0.50*1/0.75;
+
+// (b) steady state speed for the above mentioned conditions
+
+Racir=Ra+Rip+Rcw;
+
+n2=n1*(VT-(Ia2*(1+Racir)))/0.75*(1/(VT-(Ia1*Racir)));
+
+
+// Display result on command window
+
+printf("\n Steady state armature current = %0.1f A ",Ia2);
+printf("\n Steady state speed = %0.0f r/min ",n2);
+
+
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