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Diffstat (limited to '3760/CH1/EX1.33/Ex1_33.sce')
| -rw-r--r-- | 3760/CH1/EX1.33/Ex1_33.sce | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/3760/CH1/EX1.33/Ex1_33.sce b/3760/CH1/EX1.33/Ex1_33.sce new file mode 100644 index 000000000..4be6cb6f6 --- /dev/null +++ b/3760/CH1/EX1.33/Ex1_33.sce @@ -0,0 +1,19 @@ +clc;
+P=500000; // VA rating of transformer
+E2=400; // rated secondary voltage
+nmax=0.98; // maximum efficiency of transformer
+l=80; // percentage of full load at which maximum efficiency occurs
+ze2=4.5; // percentage impedance
+pt=((1/nmax)-1)*P*(l/100); // total losses
+pc=pt/2; // core loss = ohmic loss at maximum efficiency
+poh=pc; // ohmic loss
+pohl=poh*(100/l)^2; // full load ohmic losses
+re2=(pohl/P)*100; // percentage resistance
+xe2=sqrt(ze2^2-re2^2); // percentage leakage reactance
+pfl=re2/ze2; // load power factor
+vr=re2*pfl+xe2*sqrt(1-pfl^2); // voltage regulation
+dv=(E2*vr)/100; // change in terminal voltage
+V2=E2-dv; // Secondary terminal voltage
+printf('Load power factor at which secondary terminal voltage is minimum is %f\n',pfl);
+printf('Secondary terminal voltage is %f v',V2);
+// answer for total losses is given wrong in the book
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