fwave.m

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%
%  fwave.m - simulates air gap traveling mmf wave for one
%            magnetic pole-pair pitch of movement in 10
%            magnetic (electric) degree increments.
%
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clear; colordef white;
p=input('How many poles    ');   % No. of poles
theta=linspace(0,2*pi,90); n=length(theta);
ro=6; rs=5; rr=4;  % Outside, bore, & rotor radii
rgr=4.5;           % Air gap center grid radius
Ro=ro*ones(1,n);Rs=rs*ones(1,n);Rgr=rgr*ones(1,n);Rr=rr*ones(1,n);
F=zeros(1,n); phi=0; cla; 
for i=1:37; pause(0.001);
   for j=1:n; F(j)=rgr+0.45*sin(p/2*theta(j)-phi); end
polar(theta,Ro,'-.');hold on; polar(theta,Rs,'-.');
polar(theta,Rgr,'m'); polar(theta,Rr,'g-.');
text(0.9,rs+0.30,'Stator');text(-1.5,rr-0.90,'Rotor');
name=['Air gap mmf traveling wave';
   '                          ';
   '                          ']; title(name);
polar(theta,F,'r.'); hold off; phi=phi+pi/18;
end;