diff options
Diffstat (limited to '3760/CH1/EX1.45/Ex1_45.sce')
| -rw-r--r-- | 3760/CH1/EX1.45/Ex1_45.sce | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/3760/CH1/EX1.45/Ex1_45.sce b/3760/CH1/EX1.45/Ex1_45.sce new file mode 100644 index 000000000..3b79bf8dc --- /dev/null +++ b/3760/CH1/EX1.45/Ex1_45.sce @@ -0,0 +1,22 @@ +clc;
+v1=10; // voltage applied to primary when secondary is short circuited
+ip=60; // primary current when secondary is short circuited
+k=0.8; // turns ratio
+E1=250; // input voltage for load voltage has to be calculated
+E2=200; // rated voltage of secondary
+il=100; // load current
+pfo=0.24; // power factor during short circuit test
+f=(1-k)^2/k^2; // factor by which secondary impedance has to be multiplied for referring it to primary
+// ze1=z1+f*z2 therefore by ohm s law
+ze1=v1/ip; // total impedance referred to primary
+re1=ze1*pfo; // total resistance referred to primary
+xe1=ze1*sqrt(1-pfo^2); // total leakage reactance referred to primary
+disp('case a');
+pf=0.8; // lagging power factor of load
+Ip=(E2*il)/E1; // current in primary due to load current
+v2=(E1-Ip*(re1*pf+xe1*sqrt(1-pf^2)))*k;
+printf('Secondary terminal voltage at %f lagging power factor is %f v\n',pf,v2);
+disp('case b')
+pf=1; // unity power factor
+v2=(E1-Ip*(re1*pf+xe1*sqrt(1-pf^2)))*k;
+printf('Secondary terminal voltage at unity power factor is %f v',v2);
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