Voltage Distortion Minimization in Cascaded H-Bridge Inverters

  • António MartinsEmail author
  • João Faria
  • Abel Ferreira
Conference paper
Part of the Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering book series (LNICST, volume 269)


Multilevel inverters based on the series connection of H-bridges are the most modular multilevel inverter family. The use of a large number of these devices connected in series, controlled by modulation based on the fundamental frequency, allows to obtain an output voltage of the inverter with low harmonic distortion and low losses in the inverter. This paper analyses the main characteristics of a fundamental frequency modulation method applied to multilevel inverters based on cascaded H-bridges (CHB). Particular emphasis is given to the harmonic distortion of the output voltage and the range of variation of the amplitude of the fundamental component in static and dynamic conditions. It is also discussed the implementation of the algorithm in real-time and in an FPGA platform. Simulation and experimental results are presented with a different number of H-bridges.


Cascaded H-bridge inverters Multilevel inverters Square-wave modulation Total harmonic distortion 



This work was financially supported by: Project POCI-01-0145-FEDER-006933/SYSTEC - Research Center for Systems and Technologies funded by FEDER funds through COMPETE 2020 and by national funds through the FCT/MEC, and co-funded by FEDER, in the scope of the PT2020 Partnership Agreement. Abel A. Ferreira gratefully acknowledges the financial support from the People Programme (Marie Curie Actions) of the European Union’s Seventh Framework Programme FP7/2007-2013/ (Grant Agreement no. 317221), project title MEDOW.


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Copyright information

© ICST Institute for Computer Sciences, Social Informatics and Telecommunications Engineering 2019

Authors and Affiliations

  1. 1.Faculty of EngineeringUniversity of PortoPortoPortugal
  2. 2.CINERGIA - Control Intelligent de l’EnergiaBarcelonaSpain

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