Computation-Efficient Current Harmonic Mitigation for Dual Three-Phase Permanent Magnet Synchronous Motors

In this article, a computation-efficient current harmonic mitigation scheme is proposed and implemented for dual three-phase permanent magnet synchronous motors (DTP-PMSMs), namely, deadbeat-initialized (DB-initialized) continuous control set model predictive control (CCS-MPC), with the objective of reducing current harmonics and alleviating computational burden. Specifically, this article proposed a direct CCS-MPC scheme with implicit modulator, which combines control and modulation in one computation stage, thereby avoiding additional modulation delays subsequently reducing the current harmonic. Furthermore, the model predictive control (MPC) is formulated as the numerical solution of two convex quadratic programming (QP) problems. More importantly, a DB-initialized method is employed, utilizing the deadbeat computation results as the initial values for CCS-MPC, aiming to alleviate the computational burden. Lastly, the effectiveness of the proposed DB-initialized CCS-MPC scheme is verified experimentally in this article.