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| author | priyanka | 2015-06-24 15:03:17 +0530 |
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| committer | priyanka | 2015-06-24 15:03:17 +0530 |
| commit | b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b (patch) | |
| tree | ab291cffc65280e58ac82470ba63fbcca7805165 /1529/CH21/EX21.19 | |
| 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 '1529/CH21/EX21.19')
| -rwxr-xr-x | 1529/CH21/EX21.19/21_19.sce | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/1529/CH21/EX21.19/21_19.sce b/1529/CH21/EX21.19/21_19.sce new file mode 100755 index 000000000..9fdf0a437 --- /dev/null +++ b/1529/CH21/EX21.19/21_19.sce @@ -0,0 +1,23 @@ +//Chapter 21, Problem 19
+clc
+k=400000 //transformer rating
+v1=5000 //primary current
+v2=320 //secondary current
+r1=0.5 //resistance in ohm
+r2=0.001 //resistance in ohm
+lfe=2500 //iron loss
+pf=0.85 //power factor
+i1=k/v1 //primary current
+i2=k/v2 //secondary current
+lcu=(i1^2*r1)+(i2^2*r2) //total copper loss
+lt=lcu+lfe //total loss
+pt=k*pf //total output power
+pi=pt+lt //input power
+n=(1-(lt/pi))*100 //efficiency
+lc=lcu*(1/2)^2 //total copper loss at half load
+lh=lc+lfe //total loss at half loss
+ph0=(1/2)*pt //output power at half load
+phi=(ph0+lh) //input power at half load
+n1=(1-(lh/phi))*100 //efficiency
+printf("(a) Efficiency on full load = %.3f percent\n\n",n)
+printf("(b) Efficiency at half load = %.3f percent\n\n",n1)
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