New three-level voltage source inverter with different 25 space voltage vectors

Mohamed H. Saied, M. Z. Mostafa, T. M. Abdel-Moneim, H. A. Yousef

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

This paper presents a new switching strategy controlling a new three-level voltage source inverter, resulting in different 25 space voltage-vectors. The new inverter combines some desirable features of two and three-level inverters. The proposed open-leg switching strategy (OLSS) intentionally opens one of the three inverter-legs per-time, in a pre-planned sequence. Thus, the number of allowed switching states becomes 64 compared to 27 originally proposed by other modulation strategies. For a wye-connected load operating at low modulation index (M<0.5 p.u.), the output phase-voltage becomes a seven-level, 12-step waveform, instead of the 6-step one. Thus, the total harmonic distortion is highly reduced. Three new conduction-modes are presented, each verifies a reduced common-mode-voltage time-variation (dv/dt), low third harmonic content, and reduced switching frequency harmonics. For higher modulation indexes, a forth conduction mode is presented, eliminating the low frequency harmonics in the neutral-point current, consequently reducing the dc-link capacitors sizes, and cost. Analytical models, computer simulation results, and experimental verification are presented.

Original languageEnglish
Title of host publication2006 2nd International Conference on Power Electronics Systems and Applications, ICPESA
Pages102-107
Number of pages6
DOIs
Publication statusPublished - 2006
Event2006 2nd International Conference on Power Electronics Systems and Applications, ICPESA - Hong Kong, Hong Kong
Duration: Nov 12 2006Nov 14 2006

Publication series

Name2006 2nd International Conference on Power Electronics Systems and Applications, ICPESA

Other

Other2006 2nd International Conference on Power Electronics Systems and Applications, ICPESA
Country/TerritoryHong Kong
CityHong Kong
Period11/12/0611/14/06

Keywords

  • 150° conduction-mode
  • NPC
  • Neutral point clamped
  • Three-level converter
  • Total harmonic distortion
  • Voltage source inverters

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Control and Systems Engineering
  • Electrical and Electronic Engineering

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