Star-C - A novel converter topology

Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceeding


The Star-C is a new multilevel converter topology that is characterized by presenting a close to perfect sinusoidal output voltage. Its main purpose is to reduce the electromagnetic emissions that can interfere with other equipment placed nearby and to provide a high output power quality without the need of external filters. At the same time, the Star-C requires a significantly lower amount of components than multilevel converters able to reach similar performance. This work introduces the novel converter topology, explains its control and modulation and compares it with conventional two- and three-level converters in terms of THD, efficiency, current ripple and cost. The results show that the Star-C offers a THD that is up to ten times lower than its closer contester. Additionally, its efficiency is slightly higher due to the fact that zero current switching is used. On the other hand, the cost and size of the Star-C is significantly higher than the other converters under comparison. However, this work does not include the cost of the external filters that each converter might require, which is expected to reduce the cost gap between the Star-C and conventional converters. Note that this paper is based on the findings in "Star-C - A new converter topology" by Alexander Holmström.


External organisations
  • Lund University
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Energy Engineering


  • EMC, Multilevel converter, Power electronics cost, Sinusoidal voltage, Voltage source converter
Original languageEnglish
Title of host publicationIET Conference Publications
PublisherInstitution of Engineering and Technology
Publication statusPublished - 2016
Publication categoryResearch
EventMediterranean Conference on Power Generation, Transmission, Distribution and Energy Conversion, MedPower 2016 - Belgrade, Serbia
Duration: 2016 Nov 62016 Nov 9


ConferenceMediterranean Conference on Power Generation, Transmission, Distribution and Energy Conversion, MedPower 2016