This work presents an improved finite-control-set model predictive flux control (FCS-MPFC) for asymmetrical six-phase permanent magnet synchronous machine (ASPMSM) with a novel duty-cycle regulation strategy. Firstly, virtual vector concept is adopted to suppress harmonic currents without additional cost function and the corresponding weighting factor. Then, 12 virtual vectors with higher voltage utilization are developed. Meanwhile, for the sake of strengthening steady-state performance, a novel duty-cycle regulation strategy incorporating the well-known Lagrange multiplier method is proposed. In this strategy, the reconfigurable set of voltage vectors (SVV), which consists of an active and a null virtual vector, can be determined without second modification, hence highly mitigating additional computation burden. Furthermore, in order to realize the purpose of unified switching frequency, the SVVs are implemented in terms of regular rather than irregular PWM signal pattern. Finally, experimental results prove the effectiveness of the proposed method.

中文翻译：

---

具有新型占空比调节策略的非对称六相永磁同步电机的改进有限控制集模型预测通量控制

这项工作提出了一种改进的用于非对称六相永磁同步电机（ASPMSM）的有限控制集模型预测磁通量控制（FCS-MPFC），具有新颖的占空比调节策略。首先，采用虚拟矢量概念来抑制谐波电流，而无需额外的成本函数和相应的加权因子。然后，开发了12个具有较高电压利用率的虚拟矢量。同时，为了增强稳态性能，提出了一种结合了著名的拉格朗日乘数法的占空比调节策略。在这种策略下，无需进行第二次修改即可确定由有效矢量和无效虚拟矢量组成的可重新配置的电压矢量（SVV）集，从而极大地减轻了额外的计算负担。此外，为了实现统一开关频率的目的，SVV是按照规则而不是不规则的PWM信号模式实现的。最后，实验结果证明了该方法的有效性。