In this article, a novel torque boundary-based model predictive torque control (MPTC) is proposed to improve the torque and flux performance in permanent magnet synchronous motor (PMSM) drives by straightforwardly reducing the corresponding ripples. For this purpose, an optimal sequential list of two voltage vectors is considered as candidate input and the time durations of the two vectors to be applied are determined based on a predefined torque ripple tolerance band. Considering the torque outcomes both at the switching instant and at the end of the control period, the torque can be limited within the upper and lower boundaries of the preset tolerance band during the whole control period. Meanwhile, by monitoring the number of defined valid vector sequences, the torque boundaries can be optimized online. As a result, the torque ripple can be restrained to a fairly small range, and the torque boundary design work is avoided. In addition, according to the predicted torque outcomes of the candidate inputs, a group of vector sequences can be excluded from the control set before optimization, reducing the computation cost. Moreover, due to the preset torque ripple tolerance, the weighting factor in the cost function is eliminated, thereby avoiding the corresponding tuning work. Experimental results are presented to reveal the effectiveness of the proposed strategy.

中文翻译：

---

一种新型无权重永磁同步电机转矩边界模型预测转矩控制

在本文中，提出了一种新颖的基于转矩边界的模型预测转矩控制 (MPTC)，通过直接减少相应的纹波来提高永磁同步电机 (PMSM) 驱动器的转矩和磁通性能。为此，将两个电压向量的最佳顺序列表视为候选输入，并且基于预定义的转矩脉动容限带确定要施加的两个向量的持续时间。考虑到切换瞬间和控制周期结束时的扭矩结果，在整个控制周期内，可以将扭矩限制在预设公差带的上下边界内。同时，通过监控定义的有效矢量序列的数量，可以在线优化扭矩边界。其结果，可以将转矩脉动抑制在很小的范围内，避免转矩边界设计工作。此外，根据候选输入的预测扭矩结果，可以在优化前从控制集中排除一组向量序列，降低计算成本。而且，由于预设的转矩脉动容限，消除了成本函数中的权重因子，从而避免了相应的调谐工作。实验结果显示了所提出策略的有效性。由于预设的转矩脉动容限，消除了成本函数中的权重因子，从而避免了相应的调谐工作。实验结果展示了所提出策略的有效性。由于预设的转矩脉动容限，消除了成本函数中的权重因子，从而避免了相应的调谐工作。实验结果显示了所提出策略的有效性。