A 31-level cascade inverter for power applications

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Original languageEnglish
Pages (from-to)613-617
Journal / PublicationIEEE Transactions on Industrial Electronics
Issue number3
Publication statusPublished - Jun 2002


Power inverter modules fed with separate dc voltage sources of voltage ratio 1:2:4:8 are connected to form a cascade multilevel inverter. This new proposal combines the advantages of the static phase-shifter and chain-cell converter concept. Using the same number of power devices as a standard nine-level inverter, the proposed converter operates as a high-power digital-to-analog converter with 31-level resolution. ElectroLytic capacitors used in the proposed inverter for providing the dc voltage sources will never be connected in opposite polarity in all cases, thus ensuring high reliability. The proposal has the potential for uninterruptible power supply and flexible ac transmission applications.

Research Area(s)

  • Cascade inverter, Flexible ac transmission, Multilevel converters, Power amplifiers