diff options
Diffstat (limited to '3760/CH5/EX5.22/Ex5_22.sce')
-rw-r--r-- | 3760/CH5/EX5.22/Ex5_22.sce | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/3760/CH5/EX5.22/Ex5_22.sce b/3760/CH5/EX5.22/Ex5_22.sce new file mode 100644 index 000000000..b8205f9a4 --- /dev/null +++ b/3760/CH5/EX5.22/Ex5_22.sce @@ -0,0 +1,21 @@ +clc;
+v=2200; // rated voltage of motor
+p=1500; // KW rating of motor
+ie=15; // exciting current
+is=750; // short circuit current
+cl=60; // core loss in KW
+fl=40; // frictional and windage loss in KW
+// from table given in question for ie=15,
+Ef=2140; // Excitation EMF
+np=3; // number of phases
+ef=Ef/sqrt(3); // per phase open circuit voltage
+xs=ef/is; // synchronous reactance
+vt=floor(v/sqrt(3)); // per phase terminal voltage
+i=floor(vt/xs); // current phasor lagging vt
+pd=((p/2)+cl+fl)/np; // mechanical power developed per phase at half-full load output
+ia=pd*1000/vt; // working component of armature current
+// as resistance =0 , armature current=0 therefore radius of power circle=0 that is it becomes line with centre at zero
+printf('Working component of armature current is %f A\n',ia);
+printf('Terminal voltage is %f A\n',vt);
+printf('Synchronous reactance is %f ohm\n',xs);
+disp('using above data and table given in solution, V-curves and variation of p.f. with field currents can be plotted');
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