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Model predictive current control of surface-mounted permanent magnet synchronous motor with low torque and current ripple

机译：低转矩，低电流纹波的表面贴装式永磁同步电动机的模型预测电流控制

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摘要

Electromagnetic torque and stator flux of a permanent magnet synchronous motor (PMSM) can be controlled indirectly with model predictive current control (MPCC). In MPCC, a predefined cost function is minimised by selecting and applying appropriate voltage vectors to stator terminals. Since MPCC employs machine model to predict stator currents, it requires accurate knowledge of its parameters. Furthermore, MPCC results in high torque and current ripples at normal sampling rates. In this study, torque and current ripples of a surface-mounted PMSM are effectively reduced by incorporating the concept of duty cycle and applying two voltage vectors, instead of one voltage vector as in conventional MPCC, during a control period. A fuzzy logic modulator is designed and utilised to determine the duty cycles of voltage vectors. Furthermore, sensitivity of the proposed control strategy against parameter variations is alleviated by employing a full-order Luenberger observer. Various case studies are carried out on a hardware-in-the-loop setup and performance of the proposed method is compared with conventional and a recently introduced duty cycle-based predictive control. The obtained results verify the superiority of the proposed MPCC and its effectiveness in reducing the PMSM torque and current ripples with accurate and erroneous knowledge of motor parameters.
机译：永磁同步电动机（PMSM）的电磁转矩和定子磁通可以通过模型预测电流控制（MPCC）间接控制。在MPCC中，通过选择适当的电压矢量并将其施加到定子端子上，可以将预定义的成本函数最小化。由于MPCC采用机器模型来预测定子电流，因此需要准确了解其参数。此外，MPCC在正常采样率下会导致高转矩和电流纹波。在这项研究中，通过合并占空比概念并在控制期间内应用两个电压矢量（而不是传统的MPCC中的一个电压矢量），可以有效降低表面安装式PMSM的转矩和电流纹波。设计了模糊逻辑调制器并利用它来确定电压矢量的占空比。此外，通过采用全阶Luenberger观测器，可以缓解所提出的控制策略对参数变化的敏感性。在硬件在环设置中进行了各种案例研究，并将所提出的方法的性能与传统的和最近引入的基于占空比的预测控制进行了比较。所获得的结果证明了所提出的MPCC的优越性，以及在准确而错误地了解电动机参数的情况下，其在减少PMSM转矩和电流纹波方面的有效性。

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