initial commit / add all books

1 files changed, 30 insertions, 0 deletions

diff --git a/3760/CH3/EX3.14/Ex3_14.sce b/3760/CH3/EX3.14/Ex3_14.sce
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+clc;

+s=81; // number of slots

+p=6; // number of poles

+np=3; // number of phases 

+cs=13; // coil span in terms of slot pitches

+v=60; // phase spread for three phase winding

+f3=0.4; // ratio of third harmonic flux to first harmonic flux

+f5=0.25; // ratio of fifth harmonic flux to first harmonic flux

+spp=s/(p*np); // // spp is not an integer, the 2-phase winding is a fractional slot winding, therefore Sk is given by

+Sk=spp*2;

+ap=(p*180)/s;

+Cs=cs*ap; // coil span

+e=180-Cs; // chording angle

+kd1=sind(v/2)/(Sk*sind(v/(2*Sk))); // distribution factor for fundamental harmonic

+kp1=cosd(e/2); // coil span factor

+kd3=sind((3*v)/2)/(Sk*sind((3*v)/(2*Sk))); // distribution factor for third harmonic

+kp3=cosd((3*e)/2); // coil span factor for third harmonic

+kd5=sind((5*v)/2)/(Sk*sind((5*v)/(2*Sk))); // distribution factor for fifth harmonic

+kp5=cosd((5*e)/2); // coil span factor for fifth harmonic

+kw1=kd1*kp1; // winding factor for fundamental harmonics

+kw3=kd3*kp3; // winding factor for third harmonic

+kw5=kd5*kp5; // winding factor for fifth harmonic 

+ep3=(kw3*f3)/kw1; 

+printf('rms value of third harmonic emf is %f times the fundamental harmonic emf\n',ep3);

+ep5=(kw5*f5)/kw1; 

+printf('rms value of fifth harmonic emf is %f times the fundamental harmonic emf\n',ep5);

+ep=sqrt(1+ep3^2+ep5^2); // resultant phase emf

+el=sqrt(3)*sqrt(1+ep5^2); // resultant line emf

+r=el/ep; 

+printf('Ratio of resultant line emf to resultant phase emf is %f',r);