Extremum Seeking-Based Optimum Reference Flux Searching for Direct Torque Control of Interior Permanent Magnet Synchronous Motors
Extremum Seeking-Based Optimum Reference Flux Searching for Direct Torque Control of Interior Permanent Magnet Synchronous Motors
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DOI：
10.1109/tte.2019.2962327
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发表时间：
2020-03
影响因子：
7
通讯作者：
M. Mahmud;Yuheng Wu;Yue Zhao
中科院分区：
文献类型：
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作者：
M. Mahmud;Yuheng Wu;Yue Zhao
动态性能和效率对于运输应用中的内置永磁（IPM）电机驱动至关重要。在过去的几十年里，直接转矩控制（DTC）由于其快速的动态响应、对电机参数不确定性和外部干扰的鲁棒性等优点，引起了学术界和工业界的广泛关注。为了提高DTC驱动器的效率，确定最佳参考定子磁链是至关重要的，通常需要离线调整并存储在查找表中，或者使用机器模型和参数在线计算。本文首先分析了定子磁链与定子电流大小的关系。然后，基于这种关系，极值搜索控制（ESC）算法被提出来确定最佳的参考磁通在真实的时间，导致最大转矩每安培（MTPA）的方法。此外，稳定性分析和关键参数的选择建议的ESC。所提出的方法可以有效地降低电机铜损，同时，消除了耗时的离线调谐工作。此外，由于ESC是一种无模型方法，因此它对电机参数变化具有鲁棒性。所提出的方法的有效性已被验证的仿真研究，使用MATLAB Simulink和实验研究的IPM电机试验台。
Dynamic performance and efficiency are critical for the interior permanent-magnet (IPM) motor drives for transportation applications. Over the past few decades, direct torque control (DTC) has attracted attention from both academia and industry, due to its advantages, such as fast dynamic response, robustness to motor parameters uncertainties, and external disturbances. To improve the efficiency of DTC drives, it is critical to determine the optimal reference stator flux linkage, which usually needs to be either tuned offline and stored in a lookup table or calculated online using machine models and parameters. In this article, first, the relationship between the stator flux linkage and the magnitude of stator current is analyzed. Then, based on this relationship, an extremum-seeking control (ESC) algorithm is proposed to determine the optimal reference flux in real time, leading to a maximum torque-per-ampere (MTPA) like approach. In addition, a stability analysis and key parameters selection for the proposed ESC are presented. The proposed method can effectively reduce the motor copper loss and, at the same time, eliminate the time-consuming offline tuning effort. Moreover, since ESC is a model-free approach, it is robust against motor parameter variations. The effectiveness of the proposed method has been validated by simulation studies using MATLAB Simulink and experimental studies on an IPM motor test bench.