A carrier-based approach for overmodulation of three-level neutral-point-lamped inverter with zero neutral-point current

Ram Krishan Maheshwari, Stig Munk-Nielsen, S. Busquets-Monge

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

5 Citations (Scopus)

Abstract

In a voltage source inverter, overmodulation is required to extend the range of operation and enhance the dc-link voltage utilization. A carrier-based implementation of a modulation strategy for the three-level neutral-point-clamped inverter is proposed for the overmodulation region. The modulation strategy ensures zero average neutral-point current in a switching period. A newly proposed boundary compression is used to regulate the dc-link voltage at all operating points. A description of the algorithm to implement the modulation strategy is also presented. The main advantage of the proposed algorithm is its simplicity. The reference signals for the PWM can be calculated using maximum six steps and does not require knowledge of the reference vector angle. The modulation strategy has been implemented in a three-level neutral-point-clamped inverter, and experimental results are presented.
Original languageEnglish
Title of host publicationProceedings of the IEEE Energy Conversion Congress and Exposition, 2012
Place of PublicationRaleigh, NC
PublisherIEEE Press
Publication date2012
Pages1767-1773
ISBN (Print)978-1-4673-0801-4
ISBN (Electronic)978-1-4673-0802-1
DOIs
Publication statusPublished - 2012
Eventthe Fourth IEEE Energy Conversion Congress and Exposition, ECCE 2012 - Raleigh Convention Center, Raleigh, United States
Duration: 15 Sep 201220 Sep 2012

Conference

Conferencethe Fourth IEEE Energy Conversion Congress and Exposition, ECCE 2012
LocationRaleigh Convention Center
CountryUnited States
CityRaleigh
Period15/09/201220/09/2012

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