Because of the enhanced utilization of dc-link voltage and the low cost of power supply, common dc-link dual-inverter is a desirable drive topology to solve the low power factor problem of open-winding linear permanent-magnet vernier motor (OW-LPMVM). However, the common dc-link structure causes a zero-sequence current (ZSC) in the motor windings, which increases current distortion and thrust ripple of the LPMVM. To effectively decrease the ZSC as well as thrust ripple, this paper proposes a three-vector-based model predictive current control (TV-MPCC) scheme. In the proposed TV-MPCC, one optimal vector produced by one of the dual-inverter is obtained based on the deadbeat current control principle, which simplifies the prediction process and reduce the switching frequency. On the other hand, the other two optimal vectors produced by another of the dual-inverter are obtained by means of a cost function cascade evaluation, which improves the steady-state performance. With the proposed scheme, the ZSC is effectively suppressed with the simple implementation, enhanced thrust performance, fast transient response, good robustness against parameter variations, and reduced switching frequency compared with the existing ZSC suppression methods. Simulation and experimental results are demonstrated for confirming the proposed TV-MPCC.

中文翻译：

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用于开路 LPMVM 驱动器的具有零序电流抑制的基于三矢量的模型预测电流控制


由于直流母线电压利用率提高且电源成本较低，普通直流母线双逆变器是解决开式绕组线性永磁游标电机（OW-）低功率因数问题的理想驱动拓扑。 LPMVM）。然而，常见的直流母线结构会在电机绕组中产生零序电流（ZSC），从而增加 LPMVM 的电流畸变和推力纹波。为了有效降低ZSC和推力脉动，本文提出了一种基于三向量的模型预测电流控制（TV-MPCC）方案。在所提出的TV-MPCC中，基于无差拍电流控制原理获得由双逆变器之一产生的最佳矢量，这简化了预测过程并降低了开关频率。另一方面，另一个双逆变器产生的另外两个最优向量通过成本函数级联评估获得，从而提高了稳态性能。与现有的ZSC抑制方法相比，该方案实现了ZSC的有效抑制，实现简单、推力性能增强、瞬态响应快、对参数变化的鲁棒性好、开关频率降低。仿真和实验结果被证明用于确认所提出的 TV-MPCC。