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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 /2252/CH19/EX19.2 | |
| download | Scilab-TBC-Uploads-b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b.tar.gz Scilab-TBC-Uploads-b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b.tar.bz2 Scilab-TBC-Uploads-b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b.zip | |
initial commit / add all books
Diffstat (limited to '2252/CH19/EX19.2')
| -rwxr-xr-x | 2252/CH19/EX19.2/Ex19_2.sce | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/2252/CH19/EX19.2/Ex19_2.sce b/2252/CH19/EX19.2/Ex19_2.sce new file mode 100755 index 000000000..029497bb6 --- /dev/null +++ b/2252/CH19/EX19.2/Ex19_2.sce @@ -0,0 +1,28 @@ +
+//calculating torque developed by armature
+V=200//voltage applied across the motor
+Rsh=40//resistance of shunt field winding
+Ish=V/Rsh
+I=100//total current drawn by motor
+Ia=I-Ish
+Ra=.1//armature resistance
+Eb=V-Ia*Ra
+P=Eb*Ia//mechanical power developed
+N=750//speed in rpm
+Ta=60*P/(2*%pi*N)
+mprintf("Torque developed by armature=%f N-m\n",Ta)
+//calculating copper losses
+Wcu1=V*Ia-Eb*Ia//armature copper losses
+Wcu2=Ish^2*Rsh//field copper losses
+mprintf("Total copper losses=%f W\n",Wcu1+Wcu2)
+//calculating shaft power
+Wc=1500//friction and iron losses
+Pi=200*100//input to motor
+Psh=Pi-(Wc+Wcu1+Wcu2)
+mprintf("Shaft power=%f kW\n",Psh/1000)
+//calculating shaft torque
+Tsh=60*Psh/(2*%pi*N)
+mprintf("Shaft torque=%f N-m\n",Tsh)
+//calculating efficiency
+e=Psh/Pi*100
+mprintf("Efficiency=%f percent",e)
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