ODE problem in motor

Hello everybody

I wrote the following code but it has error. I could not debug it.

could you please help?

thanks in advance

clear
clc


Rs=0.1;
Rr=0.1;

Ls=0.5*10^-3;
Lr=0.5*10^-3;
M=0.8*10^-3;

B=0;
a=linspace(0,2*pi);
f=50;
w=314; % w=2*pi*f
theta=linspace(0,2*pi);
ir=200;
Vr=20;
Va=sin((w*a)-B);
Vb=sin((w*a)-B-(pi/2));



dIdt=@(t,I)[(Va-Rs*I(1)+M*w*ir*sin(theta))/Ls;(Vb-Rs*I(2)+M*w*ir*cos(theta))/Ls];
[t,I]=ode45(dIdt,[0 2*pi],[0 0])

[James Tursa]

Please post the differential equation you are trying to solve. For starters, your use of theta is incorrect.