initial commit / add all books

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+//to calculate torque,resitance to be added to rotor ckt

+

+clc;

+f=50;

+P=6;

+n_s=120*f/P;

+w_s=2*%pi*n_s/60;

+n=875;

+s_maxT=(n_s-n)/n_s;

+R_2=.25;

+X_2=R_2/s_maxT;

+T_max=10;

+//v=V/a

+v=sqrt((T_max*w_s*X_2)/(3*.5));

+T=((3)*v^2*(R_2/s))/(w_s*((R_2/s)^2+(X_2)^2));

+disp(T,'torque(Nm)');

+

+//from eqn(T_start/T_max)=(R2+Rext)*(X2/.5)/((R2+Rext)^2+X2^2)

+//after solving

+//Rt^2-6.67*Rt+4=0

+function [x]=quad(a,b,c)

+    d=sqrt(b^2-4*a*c);

+    x1=(-b+d)/(2*a);

+    x2=(-b-d)/(2*a);

+    if(x1>x2)

+        x=x2;

+    else

+        x=x1;

+    end

+endfunction

+Rt=quad(1,-6.67,4);

+r2=.25;

+disp(Rt-r2,'external resistance(ohm)');