Indirect vector control implementation for induction motor control

Hello,

I was trying to implement the indirect vector control for my induction motor control simulation on MATLAB. I designed the control loop and PI controllers based on my needs and everything works fine. But the only issue I am facing right now in the simulation is that when I send the rated flux value for indirect vector control implementation, for some reason I am getting a negative flux_d component.

I designed my controller such that my flux_d component attains the rated value and my flux_q component is 0. Here in this case I get flux_q component almost 0 but the flux_q component is negative of rated flux component (where as it should be positive).

I am using d-axis alligned to A-phase, park and inverse park transformations with power variant form. Using q axis allignment gives positve rated flux_q component while the flux_d component becomes 0.

The results of flux waveforms are as shown in figure. What might be the reason of this?

figure 1: d axis alignment transformation-

figure 2: q axis alignment transformation-

[Joel Van Sickel]

are you able to share the model?