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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 /1994/CH9/EX9.29/Example9_29.sce | |
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Diffstat (limited to '1994/CH9/EX9.29/Example9_29.sce')
| -rwxr-xr-x | 1994/CH9/EX9.29/Example9_29.sce | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/1994/CH9/EX9.29/Example9_29.sce b/1994/CH9/EX9.29/Example9_29.sce new file mode 100755 index 000000000..7394cf4f8 --- /dev/null +++ b/1994/CH9/EX9.29/Example9_29.sce @@ -0,0 +1,28 @@ +//Chapter-9,Example9_29,pg 9_83
+Pr=12*10^3//rated output
+V=200
+Rsh=80
+N1=800
+n=0.9//efficiency
+Out=0.8*Pr//output is 80% of rated
+In=Out/n//input
+TL=In-Out
+//for max. efficiency
+Iln=70//new current
+//TL=Wc+(Ia1^2)*Ra
+//bur Wc=(Ia1^2)*Ra
+Wc=TL/2
+Il=In/V
+Ish=V/Rsh
+Ia1=Il-Ish
+Ra=Wc/(Ia1^2)
+Ia2=Iln-Ish
+Wcn=Wc//const. losses remain same
+TL=(Ia2^2)*Ra+Wcn
+Pi=V*Iln
+n=(Pi-TL)*100/Pi
+Eb1=V-Ia1*Ra
+Eb2=V-Ia2*Ra
+N2=N1*Eb2/Eb1
+printf("speed of motor\n")
+printf("N2=%.3f r.p.m",N2)
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