Extended T-type boost inverter for capacitance reduction

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

1 Citation (Scopus)


In these days, multilevel inverters are focused thanks to their advantages, such as small voltage stress, low electromagnetic interferences, and harmonics reduction. Generally, renewable energy sources output a low DC voltage. From the viewpoint of efficiency, a single-stage conversion system which can directly change the lower DC-link voltage to higher AC voltage is required. Some single-stage conversion systems have been proposed before. However, these systems have large energy storage such as an inductor and a capacitor. This paper proposes a multilevel boost inverter stepping up the AC output peak voltage at any boost ratio by changing the number of switched capacitors. To reduce the capacitance, the proposed inverter has multiple conduction patterns when the output voltage is boosted. This characteristic distributes the discharging time to multiple capacitors. This inverter can set any maximum boost ratio and apply to the multiphase applications. The operation principle and the boost ability with multiple boost ratios were confirmed by simulations and experiments. The capacitance reduction was also confirmed by simulations.

Original languageEnglish
Title of host publicationProceedings - 2020 IEEE International Conference on Industrial Technology, ICIT 2020
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages6
ISBN (Electronic)9781728157542
Publication statusPublished - 2020 Feb
Event21st IEEE International Conference on Industrial Technology, ICIT 2020 - Buenos Aires, Argentina
Duration: 2020 Feb 262020 Feb 28

Publication series

NameProceedings of the IEEE International Conference on Industrial Technology


Conference21st IEEE International Conference on Industrial Technology, ICIT 2020
CityBuenos Aires


  • Boost converter
  • Multilevel inverter
  • Pulse Width Modulation (PWM)
  • Switched capacitor

ASJC Scopus subject areas

  • Computer Science Applications
  • Electrical and Electronic Engineering


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