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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/CH5/EX5.10/EX5_10.sce | |
| parent | b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b (diff) | |
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initial commit / add all books
Diffstat (limited to '3574/CH5/EX5.10/EX5_10.sce')
| -rw-r--r-- | 3574/CH5/EX5.10/EX5_10.sce | 34 |
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diff --git a/3574/CH5/EX5.10/EX5_10.sce b/3574/CH5/EX5.10/EX5_10.sce new file mode 100644 index 000000000..9484505a5 --- /dev/null +++ b/3574/CH5/EX5.10/EX5_10.sce @@ -0,0 +1,34 @@ +// Example 5.10
+// Determine (a) Range of rotor speed (b) Required rheostat resistance
+// Page No. 198
+
+clc;
+clear;
+close;
+
+// Given data
+F=60; // Frequency of motor
+P=14; // Number of poles
+SL=0.395; // Low speed point
+SH=0.02; // High speed point
+Stdmax=0.74; // Value at which TD is maximum (from curve B)
+R1=0.403; // Motor resistance
+R2=0.317;
+X1=1.32; // Motor reactance
+X2=1.32;
+a=3.8; // Ratio of stator turns/phase to rotor turns/phase
+
+// (a) Range of rotor speed
+ns=120*F/P; // Speed
+nrl=ns*(1-SL); // Rotor low speed
+nrh=ns*(1-SH); // Rotor high speed
+
+// (b) Required rheostat resistance
+Rrhe=Stdmax*(sqrt(R1^2+(X1+X2)^2))-R2;
+Rehereq=Rrhe/a^2;
+
+// Display result on command window
+printf("\n Low range of rotor speed = %0.0f r/min",nrl);
+printf("\n High range of rotor speed = %0.0f r/min",nrh);
+printf("\n Required rheostat resistance = %0.3f Ohm/phase",Rehereq);
+
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