A Comparative Study between Proportional-Integral and Proportional-Resonant Controllers in Controlling the Harmonic Current of PMSM

PI controllers and PR controllers both perform well in controlling currents for PMSM. The paper presents a comparative study of harmonic currents control of PMSM using PI and PR controllers in a feedback loop to investigate the difference between them. Firstly, the two methods are introduced and theoretically analyzed. Then, by reducing order model with pole-zero cancellation, the paper explains the selection of parameters in PI and PR feedback controllers through detailed steps. Finally, the performance of the two feedback controllers is investigated and discussed in experimental tests.