Modeling and vector control for dual three-phase PMSM

Two mathematic models for dual three-phase permanent magnet synchronous motor (PMSM) with two sets of Y-connected windings phase shifted by 30 electrical degrees are established. The electromagnetic torque based on three-phase subsystems and coupling of the two sets of windings were presented in the first model. And the second model based on vector space decomposition implied that different current harmonics have different effects on electromechanical energy conversion. According to different models, two vector control systems for dual three-phase PMSM were proposed. The relationship of these two control methods and their equivalent control performance were indicated through comparison analysis. The consistency of the two models was confirmed by open-loop simulation. And the closed-loop simulation and experiment results show that the two methods have consistent control performance when their parameters have the same value.