A Comprehensive Study on Equivalent Modulation Waveforms of the SVM Sequence for Three-Level Inverters

Juan Chen, Yingjie He, Saad Ul Hasan, Jinjun Liu

Research output: Contribution to journalArticlepeer-review

32 Citations (Scopus)

Abstract

According to the number of segments, the space vector modulation (SVM) can divide into conventional SVM sequence (CSVMS) and special SVM sequence (SSVMS). It is well known that SVM can be equivalently realized by carrier-based pulse width modulation (CBPWM) with a zero component injection in both two-level and three-level inverters. For eight segment CSVMS in three-level inverters, many papers have ever got the injected zero component equation. But similar approach does not work for SSVMS, which has more than eight segments, e.g., 10, 12, or 14. What more, the accurate injected zero component has never been achieved so far. To solve above problems, therefore, a generated decomposition method of modulation wave has been proposed in this paper. By strict theoretical derivation, the same correlation can be extended to SSVMS and the corresponding zero component expression can be acquired. Based on this method, this paper puts a lot attention on the essential feature explanation, mathematical proof, and gives a detailed process to get the zero component equation, using it can realize SSVMS by CBPWM. The simulation and experimental results illustrate that the generated decomposition method of modulation wave is correct, and the unified theory of CBPWM and SVM is verified.

Original languageEnglish
Article number7006790
Pages (from-to)7149-7158
Number of pages10
JournalIEEE Transactions on Power Electronics
Volume30
Issue number12
DOIs
Publication statusPublished - 1 Dec 2015
Externally publishedYes

Keywords

  • carrier-based pulse width modulation (CBPWM)
  • inherent correlation
  • space vector modulation (SVM)
  • three level voltage-source inverter

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