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• W3033131412 endingPage "4284" @default.
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• W3033131412 abstract "In the railway traction drive system, the reliability of DC-link capacitor banks faces enormous challenges due to the multioperation conditions, the complex physical structures, and the safe operation requirements. Considering these issues, this article proposes a reliability evaluation method of the DC-link capacitors banks to provide a guideline for preventive maintenance in the traction drive system. In the electrothermal stress analysis, different from the conventional methods, the dynamic power loss profile is obtained by the sliding-window discrete Fourier transform (DFT), and the equivalent series resistance is fit by the neural network. Afterward, a bidirectional thermal model is established to estimate the thermal stress under the dynamic power losses, considering the impact of thermal capacity, thermal coupling, and air-cooling heat dissipation. In addition, according to the stability analysis and the rated temperature limitation, an end-of-lifetime standard that meets the safe operation requirement of the train is first proposed, thereby evaluating the lifetime bottleneck of the DC-link capacitor banks. The evaluation results can provide a reference to use the low-cost on-condition maintenance instead of scheduled maintenance in the railway traction drive system. Furthermore, a prototype experiment is performed to verify the effectiveness of the electrothermal stress model." @default.
• W3033131412 created "2020-06-12" @default.
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• W3033131412 date "2021-08-01" @default.
• W3033131412 modified "2023-10-16" @default.
• W3033131412 title "Electrothermal Stress Analysis and Lifetime Evaluation of DC-Link Capacitor Banks in the Railway Traction Drive System" @default.
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• W3033131412 doi "https://doi.org/10.1109/jestpe.2020.3000130" @default.
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