In this study, an advanced predictive control system is proposed which consists of two cascade predictive controllers; the first one minimises the power losses while the second one minimises the torque ripple. In the first controller, motor losses are formulated as a function of stator-flux linkage components. Then, the optimal stator-flux linkage vector which causes the minimum losses is found by adopting fast-iterative shrinkage thresholding algorithm (FISTA). The second controller is a predictive direct torque controller adopted to control the stator-flux linkage and torque directly. In this controller, torque ripple is formulated as a function of the stator-voltage vector. Then, the optimal voltage vector which causes the minimum torque ripple is found by adopting FISTA. In the second controller, deadbeat control of the stator-flux linkage is considered as a constraint in minimisation of torque ripple. To assess the effectiveness of the proposed control system, performance of the motor is assessed through various experimental tests, where the results confirm that the proposed control system minimises the power losses and torque ripple, simultaneously. The comparative assessment with the recent predictive controllers indicates that the proposed control system has higher efficiency as well as lower torque ripples in all operating points.

中文翻译：

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通过并行执行两阶段预测控制系统，将永磁同步电动机的功率损耗和转矩脉动最小化

在这项研究中，提出了一种先进的预测控制系统，该系统由两个级联预测控制器组成。第一个使功率损耗最小，而第二个使转矩脉动最小。在第一个控制器中，根据定子磁通组件的关系来计算电动机损耗。然后，通过采用快速迭代收缩阈值算法（FISTA），找到导致损失最小的最优定子磁链矢量。第二控制器是预测性直接转矩控制器，其被采用来直接控制定子-磁链和转矩。在该控制器中，转矩脉动被公式化为定子电压矢量的函数。然后，通过采用FISTA找到导致最小转矩波动的最佳电压矢量。在第二个控制器中 定子-磁链的无差拍控制被认为是最小化转矩脉动的约束。为了评估所提出的控制系统的有效性，通过各种实验测试来评估电动机的性能，结果证实所提出的控制系统同时将功率损耗和转矩脉动减至最小。与最新的预测控制器进行的比较评估表明，所提出的控制系统在所有工作点上均具有更高的效率以及更低的转矩脉动。同时。与最新的预测控制器进行的比较评估表明，所提出的控制系统在所有工作点上均具有更高的效率以及更低的转矩脉动。同时。与最新的预测控制器进行的比较评估表明，所提出的控制系统在所有工作点上均具有更高的效率以及更低的转矩脉动。