diff options
Diffstat (limited to '3760/CH3/EX3.18/Ex3_18.sce')
| -rw-r--r-- | 3760/CH3/EX3.18/Ex3_18.sce | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/3760/CH3/EX3.18/Ex3_18.sce b/3760/CH3/EX3.18/Ex3_18.sce new file mode 100644 index 000000000..fd107806a --- /dev/null +++ b/3760/CH3/EX3.18/Ex3_18.sce @@ -0,0 +1,22 @@ +clc;
+p=6; // number of poles
+s=54; // number of slots
+n=1000; // speed of alternator in rpm
+t=80; // number of turn in coils A and B
+f=0.015; // flux per pole
+F=50; // given frequency of alternator
+// Coil A is over pitched by one slot and coil B is short pitched by one slot
+pp=s/p; // pole pitch
+sap=(p*180)/s; // slot angular pitch
+e1=(%pi*F*f*t)/sqrt(2); // EMF generated in one coil side of coil A or B
+// same EMF is generated in col side 11 but with a phase of (180+sap) degrees. Resultant of emf in coil side 1 and 11 is given by
+Ea=2*e1*cosd(sap/2); // net emf in coil side 1
+Eb=Ea; // net emf in coil side 2
+//Ea and Eb are in phase with each other from phasor diagram (fig. 3.26)
+disp('case a');
+en=Ea+Eb;
+printf('Resultant e.m.f when coils A and B are connected in series aiding is %f V\n',en);
+disp('case b');
+en=Ea-Eb;
+printf('Resultant e.m.f when coils A and B are connected in series opposing is %f V\n',en);
+
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