1 files changed, 23 insertions, 0 deletions
diff --git a/3760/CH5/EX5.37/Ex5_37.sce b/3760/CH5/EX5.37/Ex5_37.sce
new file mode 100644
index 000000000..7c7b23253
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+++ b/3760/CH5/EX5.37/Ex5_37.sce
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+clc;
+vt=3300; // terminal voltage
+xs=11; // synchronous reactance per phase
+p=8; // number of poles
+f=50; // frequency of motor
+m=3; // number of phases
+// from fig 5.82
+// at no load load angle=0 and excitation voltage=terminal voltage
+de=0;
+s=p/2; // electrical degree equivalent of one mechanical degree in space
+es=2*vt*sind(s/2); // synchronizing voltage
+is=es/xs;
+printf('Synchronizing current in the armature is %f A\n',is);
+ps=m*vt*is*cosd(de+s/2);
+printf('synchonizing power is %f KW\n',floor(ps/1000));
+ws=(2*%pi*120*f)/(60*p);
+T=ps/ws;
+printf('Synchronizing torque tending to restore rotor to its previous position is %f Nm\n',T);
+disp('case b');
+ia=30; // armature current
+dde=2*(asind((ia*xs)/(2*vt))); // change in load angle in electrical degrees
+s=dde*(2/p);
+printf('Rotor slips back by %f mechanical degrees',s);