A multilevel chain-link topology for low voltage, variable frequency applications

Luca Tarisciotti, Alessandro Costabeber, Francesco Tardelli, Roberto Cardenas

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

6 Citations (Scopus)

Abstract

The increasing demand of Electric Vehicle from the automotive industry is leading research towards higher power density and more efficient electric drives. Usually, 2-Level bidirectional AC/DC converters are utilized and the use of wide band gap devices is often considered in order to increase the power conversion efficiency. On the other hand, similar results can be obtained by a more complex power conversion system, based on standard silicon devices, such as a multilevel inverter. Amongst all the possible multilevel converter topologies, Modular Multilevel Converters (MMC) is the less considered in Electric Vehicle applications. The fundamental drawbacks of MMC which limits its applicability in low voltage, variable frequency applications is that each sub-module handles a power ripple with components at fundamental frequency and at twice the fundamental frequency which impacts the sub-module capacitance sizing, especially at low frequency. This paper proposes a modification to the MMC topology in order to expand its applicability to low voltage, high speed drives. The basic observation is that by adding a power port linking upper and lower arm sub-modules, instantaneous power can be exchanged and the voltage ripple components can be completely removed from the sub-module capacitors without impacting other parts of the converter. The paper introduces the design and analytical modelling of this novel chain-link topology and validate the theoretical claims through simulation and experimental tests.

Original languageEnglish
Title of host publication2019 IEEE Energy Conversion Congress and Exposition, ECCE 2019
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages5914-5921
Number of pages8
ISBN (Electronic)9781728103952
DOIs
Publication statusPublished - Sept 2019
Event11th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2019 - Baltimore, United States
Duration: 29 Sept 20193 Oct 2019

Publication series

Name2019 IEEE Energy Conversion Congress and Exposition, ECCE 2019

Conference

Conference11th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2019
Country/TerritoryUnited States
CityBaltimore
Period29/09/193/10/19

Keywords

  • Dual Active Bridge
  • Modular Multilevel Converter
  • Power Electronics

ASJC Scopus subject areas

  • Mechanical Engineering
  • Control and Optimization
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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