Operation and Modulation of H7 Current-Source Inverter with Hybrid SiC and Si Semiconductor Switches

Weiqi Wang, Feng Gao, Yongheng Yang, Frede Blaabjerg

Research output: Contribution to journalJournal articleResearchpeer-review

49 Citations (Scopus)

Abstract

This paper proposes an H7 current source inverter (CSI) consisting of a single shunt-connected silicon carbide (SiC) switch and a traditional silicon H6 CSI circuitry, which could employ the superior characteristics of SiC switch to significantly increase the whole switching frequency with expected low losses simultaneously. In order to reduce the switching counts and also realize the zero-current switching (ZCS) ability for rear-end CSI circuitry, two kinds of H7 CSI modulation schemes have been proposed with either superior output performance or minimal switching counts. Consequently, the proposed H7 CSI can perform as an all-SiC-switch circuitry, and guarantee high performance and high efficiency with a reduced dc inductance. It could be a cost-effective solution to address the efficiency issue of CSIs. MATLAB simulations and experimental verifications have been presented in order to show the performance of the proposed inverter.

Original languageEnglish
Article number7995036
JournalI E E E Journal of Emerging and Selected Topics in Power Electronics
Volume6
Issue number1
Pages (from-to)387-399
Number of pages13
ISSN2168-6777
DOIs
Publication statusPublished - Mar 2018

Keywords

  • Efficiency improvement
  • H7 current source inverter (CSI)
  • Silicon carbide (SiC) switch
  • Zero-current switching (ZCS)

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