function ydot = f2(t,y)
Un=400;
Uk=9;
Ukm=Uk/100*Un/sqrt(3)*sqrt(2);
Omega=314.16;
Rk=1.6;
Lh=53.389;
Ls=0.045553;
pom1=Ls/2+Lh;
pom2=Ls/2+Lh-Lh^2/pom1;
ydot=zeros(2,1);
ydot(1)=(Ukm*sin(Omega*t)-y(1)*Rk/2-Lh*y(2)*Rk/2/pom1)/pom2;
ydot(2)=(Lh*Ukm*sin(Omega*t)/pom1-Lh*y(1)*Rk/2/pom1-y(2)*Rk/2)/pom2;
end
