This paper used (15) to compensate for the field-weaken control of an induction motor, and employed three PI controllers as the subordinate controllers for the IFOC. Table
IV lists the computational results from three cases involving different parameters for these PI controllers. This table explains that the flux controller and two current controller parameters (kpf, kif, kpc1, kic1, kpc2 and kic2) could be roughly chosen, because this task was performed by the proposed FPPC.