A Multilevel Open-End Winding Six-Phase Induction Motor Drive Topology Based on Three Two-Level Three-Phase Inverters

Emerson L. Soares, Cursino B. Jacobina, Nayara B. De Freitas, Nady Rocha, Ayslan C.N. Maia, Antonio M.N. Lima

Research output: Contribution to journalArticlepeer-review

Abstract

This article presents a nine-leg (9L) multilevel inverter to drive an asymmetrical six-phase induction machine in an open-end winding (OEW) configuration. The system is based on three conventional two-level three-phase voltage source inverters (VSIs) with three, two, or one isolated dc links. A machine with two sets of 30 degrees shifted three-phase stator windings is considered. The article discusses the converters operating principles and proposes a simple space-vector pulse-width modulation (SV-PWM) and its implementation through equivalent level-shifted PWM (LS-PWM). Also, a comparative study is presented regarding the discussed 9L-OEW systems and two conventional drives: the six-leg two-level (6L), and the 12-leg OEW (12L-OEW) systems. The figures of merit were the number of components, required dc-link voltage, voltage and current harmonic distortions, torque ripple, and semiconductor losses. Simulations and experiments show results for a 1 HP machine. Finally, the article concludes that the characteristics of the 9L-OEW system using three isolated dc links fit between the 6L and 12L-OEW conventional systems.

Original languageEnglish
Pages (from-to)6360-6372
Number of pages13
JournalIEEE Transactions on Industry Applications
Volume59
Issue number5
DOIs
StatePublished - 1 Sep 2023
Externally publishedYes

Keywords

  • Asymmetrical six-phase induction motor drives
  • multilevel inverters
  • multiphase machines
  • open-end winding
  • space vector pulse width modulation

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