A simple and fast diagnostic method for multiple open-circuit faults in voltage-source inverters based on the current vector phase is proposed. The characteristics of the current vector phase in both healthy and faulty conditions are analyzed in detail, and simple fault symptom variables are defined to extract the features for fault isolation. The proposed method can diagnose 21 types of open-circuit faults only by using current vector phase information, and it is fast, robust and easy to implement in existing systems without additional sensors. Several experimental results verify that the diagnostic algorithm has no false alarms under speed and load transient conditions, and the fault can be isolated within 15% of the current fundamental cycle in the case of the fastest diagnostic process and no more than 80% of the current cycle in the worst cases. © 2021 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC.

中文翻译：

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基于电流矢量相位的电压源逆变器多路开路故障诊断方法

提出了一种基于电流矢量相位的电压源逆变器多路开路故障简单快速诊断方法。详细分析了健康和故障条件下电流矢量相位的特征，并定义了简单的故障症状变量来提取故障隔离的特征。所提出的方法仅通过使用电流矢量相位信息就可以诊断出 21 种类型的开路故障，并且它快速、鲁棒且易于在现有系统中实现，无需额外的传感器。多项实验结果验证了诊断算法在速度和负载瞬态条件下没有误报，并且在最快的诊断过程的情况下可以在当前基本周期的15%以内和在最坏的情况下不超过当前周期的80%的情况下隔离故障。© 2021 日本电气工程师学会。由 Wiley Periodicals LLC 出版。