function ydot=f2(t,y)
Un1=25;
Ukp=11;
Um=Un1/sqrt(3)*sqrt(2);
omega=2*pi*50;
Rk =  0.0063;
Ls =  4.3722e-04;
ydot=(Um*sin(omega*t)*Ukp/100-y*Rk)/Ls;
end
