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Extremum Seeking based Optimum Reference Flux Searching for Direct Torque Control of Interior Permanent Magnet Synchronous Motors
IEEE Transactions on Transportation Electrification ( IF 7.2 ) Pub Date : 2020-03-01 , DOI: 10.1109/tte.2019.2962327
Mohammad Hazzaz Mahmud , Yuheng Wu , Yue Zhao

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.

中文翻译:

基于极值搜索的内置永磁同步电机直接转矩控制的最优参考磁通搜索

动态性能和效率对于运输应用的内部永磁 (IPM) 电机驱动器至关重要。在过去的几十年中,直接转矩控制 (DTC) 因其动态响应快、对电机参数不确定性和外部干扰的鲁棒性等优点而受到学术界和工业界的关注。为了提高 DTC 驱动器的效率,确定最佳参考定子磁链至关重要,这通常需要离线调整并存储在查找表中或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。那么,基于这种关系,提出了一种极值寻求控制 (ESC) 算法来实时确定最佳参考通量,从而产生类似于最大每安培扭矩 (MTPA) 的方法。此外,还介绍了拟议 ESC 的稳定性分析和关键参数选择。所提出的方法可以有效降低电机铜损,同时消除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。所提出方法的有效性已通过使用 MATLAB Simulink 的仿真研究和在 IPM 电机测试台上的实验研究得到验证。所提出的方法可以有效降低电机铜损,同时消除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。所提出方法的有效性已通过使用 MATLAB Simulink 的仿真研究和在 IPM 电机测试台上的实验研究得到验证。所提出的方法可以有效降低电机铜损,同时消除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。所提出方法的有效性已通过使用 MATLAB Simulink 的仿真研究和在 IPM 电机测试台上的实验研究得到验证。
更新日期:2020-03-01
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