Hello TI Community,
I'm Currently doing a Field oriented control of a PMSM on Simulink. The PI current Regulator is well performing at speed up to 6000rpms, (the actual Id_motor and Iq_motor currents are nicely tracking the reference Id_Ref and Iq-Ref). But at higher speed (7000rpms or higher), I can see that Id_Motor and Iq_motor are constantly diverging from the reference Id_Ref and Iq_Ref.
*For the moment, I have no field weakening in my control system, Could that be the reason why the PI can no longer track the reference Id and Iq at higher speed?
* Or, Should I have Speed Dependent PI Coefficients ? (for example a Lookup table for tuning the PI coefficients as the motor spins in higher frequencies..! )
Thank you very much for the help.!
BR,
Abdelmouneim.