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Analysis and Control of Current Ripples of Z-Source Inverters

  • School of Electrical Engineering and Automation, Harbin Institute of Technology

Research output: Contribution to journalArticlepeer-review

Abstract

Load current ripple is an important issue in the design and control of inverters since it influences the torque ripple and noise amplitude of a motor drive. The current ripple of Z-source inverter (ZSI) is analyzed in this paper. The expression of current ripple is derived and the current ripples of ZSI and voltage-source inverter (VSI) are compared. A variable DC-link voltage and switching frequency method was adopted to reduce conduction and switching losses without increasing the predicted peak current ripple. These theoretical findings were further verified by simulations and experiments.

Original languageEnglish
Article number9016256
Pages (from-to)41220-41228
Number of pages9
JournalIEEE Access
Volume8
DOIs
StatePublished - 2020
Externally publishedYes

Keywords

  • DC-link voltage
  • Z-source inverter
  • current ripple
  • switching frequency

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