initial commit / add all books

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
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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);