initial commit / add all books

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);