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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 /3760/CH5/EX5.43/Ex5_43.sce | |
| parent | b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b (diff) | |
| download | Scilab-TBC-Uploads-7f60ea012dd2524dae921a2a35adbf7ef21f2bb6.tar.gz Scilab-TBC-Uploads-7f60ea012dd2524dae921a2a35adbf7ef21f2bb6.tar.bz2 Scilab-TBC-Uploads-7f60ea012dd2524dae921a2a35adbf7ef21f2bb6.zip | |
initial commit / add all books
Diffstat (limited to '3760/CH5/EX5.43/Ex5_43.sce')
| -rw-r--r-- | 3760/CH5/EX5.43/Ex5_43.sce | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/3760/CH5/EX5.43/Ex5_43.sce b/3760/CH5/EX5.43/Ex5_43.sce new file mode 100644 index 000000000..26382f727 --- /dev/null +++ b/3760/CH5/EX5.43/Ex5_43.sce @@ -0,0 +1,22 @@ +clc;
+p=100*10^3; // rated power of alternator
+v=440; // rated voltage of alternator
+m=3; // number of phases
+l1=340; // friction and windage losses
+l2=480; // open circuit core losses
+rf=180; // field winding resistance at 75 degree cel.
+ra=0.02; // armature resistance per phase
+vf=220; // voltage applied to field winding
+pf=0.8; // power factor
+disp('At half load');
+ia=p/(sqrt(3)*v); // full load armature current
+l3=(m*ia^2*ra)/4; // short circuit load loss at half load
+l4=vf^2/rf; // field circuit loss
+lt=l1+l2+l3+l4; // net loss
+n=(1-(lt/((p/2)*pf+lt)))*100;
+printf('Efficiency is %f percent\n',n);
+disp('At full load');
+l3=m*ia^2*ra; // short circuit load loss at full load
+lt=l1+l2+l3+l4; // net loss
+n=(1-(lt/(p*pf+lt)))*100;
+printf('Efficiency is %f percent\n',n);
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