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Diffstat (limited to '1892/CH1/EX1.55/Example1_55.sce')
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1 files changed, 21 insertions, 0 deletions
diff --git a/1892/CH1/EX1.55/Example1_55.sce b/1892/CH1/EX1.55/Example1_55.sce new file mode 100755 index 000000000..23087d4bb --- /dev/null +++ b/1892/CH1/EX1.55/Example1_55.sce @@ -0,0 +1,21 @@ +// Example 1.55
+
+clear; clc; close;
+
+format('v',7);
+// Given data
+TmByTfl=2.2;//ratio
+R2=0.5;//in ohm per phase
+X2=5;//in ohm per phase
+K=70;//tapping in %
+
+//Calculations
+//Formula :Tst proportional to E2^2*R2/(R2^2+X2^2)
+//Formula :Tm proportional to E2^2/(2*X2)
+//Formula :Tfl proportional to 1/4.4*E2^2/X2
+TstByTfl=R2/(R2^2+X2^2)*TmByTfl*2*X2;//ratio for direct on line
+disp(TstByTfl,"Ratio of starting torque to full load torque for direct on line starter : ");
+TstByTfl=(1/sqrt(3))^2*R2/(R2^2+X2^2)*TmByTfl*2*X2;//ratio for star delta starting
+disp(TstByTfl,"Ratio of starting torque to full load torque for star delta starter : ");
+TstByTfl=(K/100)^2*R2/(R2^2+X2^2)*TmByTfl*2*X2;//ratio for auto transformer starting
+disp(TstByTfl,"Ratio of starting torque to full load torque for auto transformer starter : ");
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