On Accelerated Degradation of DC-Link Film Capacitors and Data-Based Lifetime Estimation
Methods to address the lifetime of film capacitors are a new trend, which have come about due to the importance of control algorithms relying on the stability and the reliability of this passive device for controlling ever-increasing power with optimal power conversion efficiency in modern powertrai...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
IEEE
2024-01-01
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| Series: | IEEE Access |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/10705426/ |
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| Summary: | Methods to address the lifetime of film capacitors are a new trend, which have come about due to the importance of control algorithms relying on the stability and the reliability of this passive device for controlling ever-increasing power with optimal power conversion efficiency in modern powertrains of electrical vehicles. Capacitance degradation over time is a key-parameter to determine the lifetime of an electric vehicle drive and to provide safety to the passengers. In this paper, a method to account for the degradation of film capacitors is presented considering a charge-and-discharge method at a steady temperature to better understand its capacitance and equivalent series resistor changing behaviour. The temperature of the capacitor is set at a maximum rated level (from the manufacturer information) to assess an accelerated degradation, to address the physics of failure for these film capacitors and to propose a lifetime estimation method for them. |
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| ISSN: | 2169-3536 |