Predictive approach to increase efficiency and reduce switching losses on matrix converters

René Vargas, Ulrich Ammann, José Rodríguez

Research output: Contribution to journalArticlepeer-review

168 Citations (Scopus)

Abstract

The matrix converter stands as an alternative in power conversion. It has no energy storage devices, performing the energy conversion by directly connecting input with output phases through bidirectional switches based on power semiconductors, allowing high-frequency operation. For this reason, it is known as the all-silicon power converter, featuring reduced size and weight. Forced commutations of the high number of semiconductors cause switching losses that reduce the efficiency of the system and imply the use of large heat sinks. This paper presents a novel method to reduce switching losses based on predictive control. The idea is to predict switching losses for every valid switching state of the converter, if applied during the next sampling time, and then, select the optimum state based on an evaluation criterion. The proposed strategy was experimentally tested on an 18-kVA matrix converter driving an 11-kW induction machine, reducing energy losses and increasing efficiency up to 3% compared to the basic strategy. As a consequence, the converter misuses less energy and requires smaller heat sinks.

Original languageEnglish
Pages (from-to)894-902
Number of pages9
JournalIEEE Transactions on Power Electronics
Volume24
Issue number4
DOIs
Publication statusPublished - 2009

Keywords

  • Efficiency
  • Matrix converter (MC)
  • Power conversion
  • Predictive control
  • Switching losses

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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