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Calculation and Spectral Analysis of DC-Link Current for three phase PWM inverter

  • Jianxia Sun
  • , Cheng Lin*
  • *Corresponding author for this work
  • Beijing Institute of Technology

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

Abstract

Due to the effect of high-frequency switches, the dc-link current of the PWM inverter contains a large number of harmonic components, which results in ripple fluctuations of dc bus voltage and directly affects the quality and reliability of the power supply system. According to the Double Fourier Series method, we deduce the expressions of the dc-link current, which include the low frequency and high frequency parts. Besides, the effect of the output current harmonics on the dc-link current is considered, which improves the accuracy of the expression. Based on the derived expressions, we quantize the spectrum of the dc-link current. From the view of magnitude, we deduce the specific harmonic distribution in the frequency domain. The quantized spectrum of dc-link current provides the guideline for the dc filter design, which can reduce the system volume and cost. Finally, the theoretical analysis of dc-link current is verified by the Fast Fourier Transform analysis results obtained by the simulation model platform.

Original languageEnglish
Title of host publicationProceedings of 2021 21st International Symposium on Power Electronics, Ee 2021
EditorsVladimir Katic
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781665401876
DOIs
Publication statusPublished - 2021
Event21st International Symposium on Power Electronics, Ee 2021 - Novi Sad, Serbia
Duration: 27 Oct 202130 Oct 2021

Publication series

NameProceedings of 2021 21st International Symposium on Power Electronics, Ee 2021

Conference

Conference21st International Symposium on Power Electronics, Ee 2021
Country/TerritorySerbia
CityNovi Sad
Period27/10/2130/10/21

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

  1. SDG 7 - Affordable and Clean Energy
    SDG 7 Affordable and Clean Energy

Keywords

  • Double Fourier Series
  • PWM inverter
  • harmonic

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