A condition-monitoring method of DC-link capacitors used in a high-power three-phase PWM inverter with an evaluation circuit

Kazunori Hasegawa, Shin ichi Nishizawa, Ichiro Omura

    Research output: Contribution to journalArticlepeer-review

    9 Citations (Scopus)

    Abstract

    This paper presents a condition-monitoring method of dc-link capacitors used in a high-power three-phase PWM inverter with an evaluation circuit intended for ageing tests. Although its power rating is 1/25 of the inverter, the evaluation circuit provides the equivalent ripple current waveform and dc-bias voltage to the high-power inverter. The monitoring method independently extracts the capacitance and ESR of the dc-link capacitor, where the fast Fourier transform is introduced to the ripple current waveform and the dc-link voltage of the evaluation circuit. Experimental results verify that the monitoring method obtains both the ESR and capacitance changes of a capacitor under test.

    Original languageEnglish
    Pages (from-to)480-487
    Number of pages8
    JournalIEEJ Journal of Industry Applications
    Volume8
    Issue number3
    DOIs
    Publication statusPublished - 2019

    All Science Journal Classification (ASJC) codes

    • Automotive Engineering
    • Energy Engineering and Power Technology
    • Mechanical Engineering
    • Industrial and Manufacturing Engineering
    • Electrical and Electronic Engineering

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