A Two-Terminal Active Capacitor

Haoran Wang, Huai Wang

    Research output: Contribution to journalArticlepeer-review

    76 Scopus citations

    Abstract

    This letter proposes a concept of two-terminal active capacitor implemented by power semiconductor switches and passive elements. The active capacitor has the same level of convenience as a passive one with two power terminals only. It is application independent and can be specified by rated voltage, ripple current, equivalent series resistance, and operational frequency range. The concept, control method, self-power scheme, and impedance characteristics of the active capacitor are presented. A case study of the proposed active capacitor for a capacitive dc-link application is discussed. The results reveal a significantly lower overall energy storage of passive elements and a reduced cost to fulfill a specific reliability target, compared to a passive capacitor solution. Proof-of-concept experimental results are given to verify the functionality of the proposed capacitor.

    Original languageBritish English
    Article number7852443
    Pages (from-to)5893-5896
    Number of pages4
    JournalIEEE Transactions on Power Electronics
    Volume32
    Issue number8
    DOIs
    StatePublished - Aug 2017

    Keywords

    • Active circuits
    • capacitors
    • power converter
    • reliability

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