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A Hybrid System Model-Based Open-Circuit Fault Diagnosis Method of Three-Phase Voltage-Source Inverters for PMSM Drive Systems
Electronics ( IF 2.9 ) Pub Date : 2020-08-04 , DOI: 10.3390/electronics9081251
Tao Chen , Yuedou Pan , Zhanbo Xiong

This paper presents an open-circuit (OC) fault diagnosis method of three-phase voltage-source inverters (VSIs) for permanent magnet synchronous motor (PMSM) drive systems based on the hybrid system model (HSM). On the basis of phase voltage analysis, the HSM of the PMSM-inverter system was established, which can describe the system more accurately. To quickly diagnose whether the fault occurs, a current estimator was constructed based on the healthy HSM. Different fault types of the VSI can be simulated synchronously by the HSM, and the similarity between each simulated fault type and the actual one is evaluated based on the Euclidean distance method. Therefore, the fault isolation can be carried out according to the characteristics of Euclidean distances. The proposed method has the advantages of fast diagnosis speed and strong robustness, and it does not require additional sensors. By the presented diagnosis algorithm, the fault can be detected and isolated within a time interval about 5% and 10% of the current fundamental wave period, respectively. The simulation and experimental results verify the effectiveness of the proposed method.

中文翻译:

基于混合系统模型的永磁同步电机驱动系统三相电压源逆变器开路故障诊断方法

本文提出了一种基于混合系统模型(HSM)的永磁同步电动机(PMSM)驱动系统的三相电压源逆变器(VSI)的开路(OC)故障诊断方法。在相电压分析的基础上,建立了PMSM-逆变器系统的HSM,可以更准确地描述系统。为了快速诊断是否发生故障,基于健康的HSM构建了一个当前估算器。HSM可以同步模拟VSI的不同故障类型,并基于欧氏距离方法评估每种模拟故障类型与实际故障类型之间的相似性。因此,可以根据欧几里得距离的特性进行故障隔离。该方法具有诊断速度快,鲁棒性强等优点。并且不需要额外的传感器。通过提出的诊断算法,可以分别在大约当前基波周期的5%和10%的时间间隔内检测和隔离故障。仿真和实验结果验证了该方法的有效性。
更新日期:2020-08-04
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