1 files changed, 28 insertions, 0 deletions
diff --git a/3760/CH7/EX7.8/Ex7_8.sce b/3760/CH7/EX7.8/Ex7_8.sce
new file mode 100644
index 000000000..744df0e7e
--- /dev/null
+++ b/3760/CH7/EX7.8/Ex7_8.sce
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+clc;
+p=4; // number of poles
+z=2540; // number of conductors
+s=32; // number of slots
+c=127; // number of commutator sectors=total number of coils
+v=500; // induced voltage required
+f=5*10^-3; // field flux per pole
+a=2; // number of parallel paths
+zs=ceil(z/s); // conductors per slot
+// for zs=80
+Z=zs*s; // total conductors
+t=floor(Z/(2*c)); // turn per coil
+C=Z/(2*t); // actual number of coils
+// It is necessary that actual coils should be same as commutator segments so one coil is made dummy
+disp('commutor pitch is')
+disp((c+1)/(p/2));
+disp('or');
+disp((c-1)/(p/2));
+disp('Winding pitch is')
+disp(((2*c)+2)/(p/2));
+disp('or');
+disp(((2*c)-2)/(p/2));
+disp('For progressive winding, back pitch=65 and front pitch=63');
+disp('For retrogressive winding, back pitch=63 and front pitch=63');
+// since dumy coil is not in circuit, number of active conductor is
+Z=c*t*2;
+n=(v*a*60)/(f*Z*p);
+printf('Speed for required induced voltage is %f rpm',n);