diff options
Diffstat (limited to '3760/CH5/EX5.11/Ex5_11.sce')
-rw-r--r-- | 3760/CH5/EX5.11/Ex5_11.sce | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/3760/CH5/EX5.11/Ex5_11.sce b/3760/CH5/EX5.11/Ex5_11.sce new file mode 100644 index 000000000..0ff034a65 --- /dev/null +++ b/3760/CH5/EX5.11/Ex5_11.sce @@ -0,0 +1,15 @@ +clc;
+v=415; // rated voltage of motor
+f=50; // frequency of motor
+ef=520; // line to line excitation emf
+p=6; // number of poles
+xs=2; // per phase synchronous reactance
+t=220; // torque developed
+vt=v/sqrt(3); // rated per phase voltage
+eft=ef/sqrt(3); // per phase excitation emf
+ws=(4*%pi*f)/p; // synchronous speed
+de=asind((t*ws*xs)/(3*vt*eft)); // load angle
+ia=(sqrt(vt^2+eft^2-2*eft*vt*cosd(de)))/xs; // from phasor diagram(fig 5.48),armature current
+pf=(ef*sind(de))/(xs*ia*sqrt(3));
+printf('Current drawn from supply is %f A\n',ia);
+printf('Power factor is %f leading',pf);
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