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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 /416/CH4/EX4.12 | |
| 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 '416/CH4/EX4.12')
| -rwxr-xr-x | 416/CH4/EX4.12/ans4_12.txt | 20 | ||||
| -rwxr-xr-x | 416/CH4/EX4.12/example4_12.sce | 27 |
2 files changed, 47 insertions, 0 deletions
diff --git a/416/CH4/EX4.12/ans4_12.txt b/416/CH4/EX4.12/ans4_12.txt new file mode 100755 index 000000000..865e4d722 --- /dev/null +++ b/416/CH4/EX4.12/ans4_12.txt @@ -0,0 +1,20 @@ +
+ example 4 12
+
+ (a)
+ total current 433.01 -286jA
+ overall power factor 0.834 lagging
+ copper losses in synchrounous motor 6250W
+ copper losses in cable 24.25KW
+ (b)
+ total current 433.01 -178jA
+ overall power factor 0.925 lagging
+ copper losses in synchrounous motor 6250W
+ copper losses in cable 19.73KW
+ (c)
+ total current 433.01 -94jA
+ overall power factor 0.977 lagging
+ copper losses in synchrounous motor 6250W
+ copper losses in cable 17.67KW
+ (d)
+copper loss of synchronous motor this is evidently minimum when tand=0 cosd=1
\ No newline at end of file diff --git a/416/CH4/EX4.12/example4_12.sce b/416/CH4/EX4.12/example4_12.sce new file mode 100755 index 000000000..3448d7535 --- /dev/null +++ b/416/CH4/EX4.12/example4_12.sce @@ -0,0 +1,27 @@ +clc
+clear
+disp("example 4 12")
+psm=100 //power of synchrounous motors
+pim=200 //power of inducion motor
+v=400 //voltage
+pff=0.71;pp=-1//power factor
+rsm=0.1 //resistance of synchrounous motor
+rt=0.03 //resistance of cable
+pf(1)=1;p(1)=1 //power factor in a
+pf(2)=0.8;p(2)=1 //power factor in b
+pf(3)=0.6;p(3)=1 //power factor in c
+i1=pim*1000/(v*pff*sqrt(3))
+i11=i1*(complex(pff,pp*sind(acosd(pff))))
+i2f=psm*1000/(v*sqrt(3))
+ch=['a' 'b' 'c']
+for i=1:3
+ printf("\n (%c)",ch(i))
+ d=acosd(pf(i))
+ it(i)=i11(1)+complex(i2f,(p(i)*i2f*tand(d)))
+ opf(i)=cosd(atand(imag(it(i))/real(it(i))))
+ clsm=3*((i2f)^2)*rsm
+ clt=3*(abs(it(i))^2)*rt/1000
+ printf("\n total current %.2f %.fjA \n overall power factor %.3f lagging \n copper losses in synchrounous motor %.fW \n copper losses in cable %.2fKW",it(i),imag(it(i)),opf(i),clsm,clt)
+end
+disp("(d)")
+printf("copper loss of synchronous motor this is evidently minimum when tand=%d cosd=%d",0,1)
\ No newline at end of file |