Stator-Flux-Oriented Decoupling Control Strategy for Dual Three-Phase Permanent Magnet Motor

摘要

Thanks to the excellent features of power density and efficiency, the dual three-phase permanent magnet motor (DTP-PMSM) has attracted more and more attentions in drive applications. However, the conventional finite control set strategies of DTP-PMSM drives exhibit the poor steady-state performance. To improve the steady-state performance of DTP-PMSM, a decoupling control strategy based on stator flux orientation is studied in this paper. Firstly, the mathematical model of the DTP-PMSM in the stator-flux-oriented xy rotating coordinate system is analyzed. The components of torque and flux can be decoupled, respectively and the principle of stator-flux-oriented decoupling control strategy is farther deduced. Then, a stator-flux-oriented decoupling control system is established considering all of the torque, flux linkage and harmonic currents. Finally, experiments on a DTP-PMSM are carried out to verify the feasibility and effectiveness of the proposed strategy.