Fast In-Loop Single-Tube Open-Circuit Fault Diagnosis for Voltage Source Inverter Based on Duality of Current-Time Pairs

Zhao, Xiaolong; Sun, Xianrui; Diao, Naizhe; Zhao, Jing

doi:10.1109/tie.2022.3212398

Cited by 3 publications

(2 citation statements)

References 27 publications

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“…From Table 3, the proposed method can quickly diagnose faults within 2/5 cycle. Compared with other current-based diagnosis methods [43], it can be applied to multipleswitch faults. Compared with the voltage-based methods, such as [24], though it has the fastest diagnostic speed and highest accuracy, it needs additional voltage sensors or detection circuits, which increases the cost and failure points.…”

Section: Compared With Other Methodsmentioning

confidence: 99%

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An Open-Circuit Fault Diagnosis Method Based on Adjacent Trend Line Relationship of Current Vector Trajectory for Motor Drive Inverter

Sun,

Diao,

Song

et al. 2023

Machines

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This paper proposes a power switch open-circuit (OC) fault diagnosis method for a motor drive inverter system. This method utilizes adjacent trend lines to extract fault features from the current vector trajectory, enabling rapid fault diagnosis and localization. Firstly, the current vector trajectory is obtained by applying the Clark transformation to the three-phase currents, and trend line slopes are calculated using equidistant current signal nodes. Subsequently, the method determines fault by calculating changes in adjacent trend line slopes and quickly locates the faulty power switch by considering the average slope of adjacent trend lines and the beta-axis current direction in the alpha–beta coordinate system. Accurate OC fault localization can be achieved with just a few trend line data points calculated in each current cycle, reducing the extra hardware and computational burden. This method is not only suitable for load variations but also applicable to the diagnosis of both single-switch and multiple-switch faults. Finally, simulation and experimental results validate the effectiveness and robustness of the method.

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Section: Compared With Other Methodsmentioning

confidence: 99%

“…Ref. [43] proposes a neural-network-like structure for diagnosing open-circuit faults in traction motor drive systems using dual current-time pairs. These two methods shorten the fault diagnosis time, but they are only applicable to single-switch fault diagnosis, which significantly limits their scope of application in industrial settings.…”

Section: Introductionmentioning

confidence: 99%