Reliability evaluation of DC-link capacitors in multi-drive systems

Shili Huang, Haoran Wang, Dinesh Kumar, Guorong Zhu, Huai Wang

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

    4 Scopus citations

    Abstract

    This paper proposes a time-efficient equivalent model for the ripple current analysis of DC-link capacitors in multi-drive systems and investigates the impact of number of drives and grid voltage unbalance on the capacitor lifetime. Firstly, a time-efficient equivalent model for multi-drive systems is proposed to obtain the electro-thermal stress of capacitor in individual drive. Then, applying the lifetime prediction method, the reliability of the DC-link capacitors in multi-drive systems considering the interactions among multiple drives are studied. Finally, the quantitative impact of number of drives and unbalanced grid conditions on the lifetime of DC-link capacitors are discussed. The outcomes support the model based sizing of DC-link capacitors for multi-drive systems considering the electro-thermal and lifetime aspect requirements.

    Original languageBritish English
    Title of host publication2019 IEEE Energy Conversion Congress and Exposition, ECCE 2019
    PublisherInstitute of Electrical and Electronics Engineers Inc.
    Pages3157-3162
    Number of pages6
    ISBN (Electronic)9781728103952
    DOIs
    StatePublished - Sep 2019
    Event11th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2019 - Baltimore, United States
    Duration: 29 Sep 20193 Oct 2019

    Publication series

    Name2019 IEEE Energy Conversion Congress and Exposition, ECCE 2019

    Conference

    Conference11th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2019
    Country/TerritoryUnited States
    CityBaltimore
    Period29/09/193/10/19

    Keywords

    • Adjustable speed drive
    • DC-link capacitor
    • Lifetime
    • Multi-drive systems

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