Space vector pulsewidth amplitude modulation for a buck-boost voltage/current source inverter

Qin Lei, Fang Zheng Peng

Research output: Contribution to journalArticle

35 Scopus citations

Abstract

This paper proposes a space vector pulsewidth amplitude modulation (SVPWAM) method for a buck-boost voltage/current source inverter. For a voltage source inverter, the switching loss is reduced by 87%, compared to a conventional sinusoidal pulsewidth modulation (SPWM) method. For a current source inverter, the switching loss is reduced by 60%. In both cases, the power density is increased by a factor of 2 to 3. In addition, it is also verified that the output harmonic distortions of SVPWAM is lower than SPWM, by only using one-third switching frequency of the latter one. A 1-kW boost-converter-inverter prototype has been built and tested using this modulation method. The maximum overall system efficiency of 96.7% has been attained at full power rating. The whole system power density reaches 2.3 kW/L and 0.5 kW/lb. The numbers are remarkable at this power rating. As a result, it is feasible to use SVPWAM to make the buck-boost inverter suitable for applications that require high efficiency, high power density, high temperature, and low cost. Such applications include electric vehicle motor drive or engine starter/alternator.

Original languageEnglish (US)
Article number6532407
Pages (from-to)266-274
Number of pages9
JournalIEEE Transactions on Power Electronics
Volume29
Issue number1
DOIs
StatePublished - Jan 1 2014
Externally publishedYes

Keywords

  • Buck-boost
  • SVPWAM
  • THD
  • switching loss reduction

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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