A Hybrid PI-FOC and CCS-MPC Method for Multiple Harmonic Current Suppression in Multiphase Machines

Compared with PI-FOC(Field Oriented Control), MPC(Model Predictive Control) has better dynamic performance and higher system bandwidth, but poor steady-state performance due to model parameter mismatch. A hybrid control method of PI-FOC and CCS-MPC for multiple harmonic suppression is proposed in this paper. The fundamental current control adopts the traditional PI-FOC, which ensures good steady-state performance through the suitable PI parameters, while the harmonic plane adopts the two-step CCS-MPC, which can simultaneously suppress multiple harmonics in the specific harmonic plane with the proposed feedback correction method, avoiding the use of massive PI controllers in the harmonic plane compared to traditional PI-FOC with guaranteed system bandwidth. The harmonic suppression effect of the proposed scheme is excellent, which improves the bandwidth of the system while ensuring a fast dynamic response and has good parameter robustness.