Fault-tolerant control of current residual vector three-phase four-switch motor drive system based on MLD model

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Accounts of Chemical Research Pub Date : 2024-04-04 DOI:10.1049/pel2.12688

Dezhi Chen, Wenbo Zhao, Yun Sun, Wenliang Zhao, Zhixiang Zhang, Ziyuan Xin

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Abstract

Aiming at the problem of single-phase switch tube open circuit fault in inverters, a current residual vector three-phase four-switch fault-tolerant control strategy based on the mixed logic dynamic (MLD) model of permanent magnet synchronous motor (PMSM) drive system is proposed. Firstly, the MLD and three-phase four-switch mathematical models of the motor drive system are established and a calculation method of DC bus capacitance is proposed. Secondly, to improve the dynamic performance of the motor, an improved vector control based on the MLD model is proposed. Finally, by setting the threshold and dividing the area of the current residual vector, the accuracy of inverter fault diagnosis is improved, and the fast and smooth switching of the drive system after the fault is realized. Simulation and experimental results show that this strategy can effectively reduce the influence of calculation error and system noise, and has strong robustness for the change of motor speed and load.

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基于 MLD 模型的电流残差矢量三相四开关电机驱动系统容错控制

针对逆变器单相开关管开路故障问题，提出了一种基于永磁同步电机（PMSM）驱动系统混合逻辑动态（MLD）模型的电流残差矢量三相四开关容错控制策略。首先，建立了电机驱动系统的 MLD 和三相四开关数学模型，并提出了直流母线电容的计算方法。其次，为改善电机的动态性能，提出了基于 MLD 模型的改进型矢量控制。最后，通过设置阈值和划分电流残差矢量的区域，提高了变频器故障诊断的准确性，实现了故障后驱动系统的快速平滑切换。仿真和实验结果表明，该策略能有效降低计算误差和系统噪声的影响，对电机转速和负载的变化具有很强的鲁棒性。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.