A numerical method for calculating the output spectrum of an H-bridge inverter with dead-time based on switching mode analysis

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Abstract

The distortion of an H-bridge inverter originates from many nonlinear factors, of which the most dominant one is typically the dead-time. Different analytical and numerical methods have been proposed to calculate the distortion caused by the dead-time. However, all the existing methods are neglecting the effects of soft-switching and discontinuous conduction mode, resulting in a deviation with the practice. In this paper, the characteristics and the corresponding effects of each individual switching mode is analysed. Current constraint functions are proposed in order to determine the time position of different switching modes. A numerical method for calculating the output spectrum of the H-bridge inverter based on the switching mode analysis is introduced. The method has an improved accuracy compared to the previous analytical method especially when the inductor current ripple is high. The results are verified by simulation and an experimental prototype.
Original languageEnglish
Title of host publication2019 IEEE Energy Conversion Congress and Exposition (ECCE 2019)
Place of PublicationPiscataway
PublisherInstitute of Electrical and Electronics Engineers
Pages2245-2251
Number of pages7
ISBN (Electronic)9781728103952
DOIs
Publication statusPublished - Sep 2019
Event2019 IEEE Energy Conversion Congress and Exposition (ECCE) - The Baltimore Convention Center, Baltimore, United States
Duration: 29 Sep 20193 Oct 2019
http://www.ieee-ecce.org/2019/

Conference

Conference2019 IEEE Energy Conversion Congress and Exposition (ECCE)
Abbreviated titleECCE
CountryUnited States
CityBaltimore
Period29/09/193/10/19
Internet address

Keywords

  • harmonics
  • dead-time
  • soft-switching
  • discontinuous conduction mode
  • hard-switching
  • Harmonics
  • Hard-switching
  • Dead-time
  • Soft-switching
  • Discontinuous conduction mode

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