Reliability of capacitors for DC-link applications in power electronic converters - An overview

Huai Wang, Frede Blaabjerg

    Research output: Contribution to journalArticlepeer-review

    1184 Scopus citations

    Abstract

    DC-link capacitors are an important part in the majority of power electronic converters which contribute to cost, size and failure rate on a considerable scale. From capacitor users' viewpoint, this paper presents a review on the improvement of reliability of dc link in power electronic converters from two aspects: 1) reliability-oriented dc-link design solutions; 2) conditioning monitoring of dc-link capacitors during operation. Failure mechanisms, failure modes and lifetime models of capacitors suitable for the applications are also discussed as a basis to understand the physics-of-failure. This review serves to provide a clear picture of the state-of-the-art research in this area and to identify the corresponding challenges and future research directions for capacitors and their dc-link applications.

    Original languageBritish English
    Article number6748007
    Pages (from-to)3569-3578
    Number of pages10
    JournalIEEE Transactions on Industry Applications
    Volume50
    Issue number5
    DOIs
    StatePublished - 1 Sep 2014

    Keywords

    • Ceramic capacitors
    • Dc link
    • Electrolytic capacitors
    • Film capacitors
    • Power converters
    • Reliability

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