Comparison of Neutral-Point-Clamped, Symmetrical, and Hybrid Asymmetrical Multilevel Inverters

Author

Zambra, Diorge A B ; Rech, Cassiano ; Pinheiro, José Renes

Author_Institution

Dept. de Cienc. Exatas e Tecnol., Univ. de Caxias do Sul (UCS), Caxias do Sul, Brazil

Volume

57

Issue

7

fYear

2010

fDate

7/1/2010 12:00:00 AM

Firstpage

2297

Lastpage

2306

Abstract

This paper presents a comparison of three topologies of multilevel inverters applied to drive an induction motor of 500 kVA/4.16 kV rating. The multilevel inverters analyzed are the following: a neutral-point-clamped inverter, a symmetrical cascaded multilevel inverter, and a hybrid asymmetrical cascaded multilevel inverter. The performance indexes used in the comparison are total harmonic distortion, first-order distortion factor, second-order distortion factor, common-mode voltage, semiconductor power loss distribution, and heat-sink volume. The multilevel inverters are designed to present 99% efficiency at the nominal operating point, and the aforementioned performance indexes are compared for distinct values of amplitude modulation depth.

Keywords

induction motors; invertors; power system harmonics; variable speed drives; apparent power 500 kVA; common-mode voltage; first-order distortion factor; heat-sink volume; hybrid asymmetrical cascaded multilevel inverters; induction motor; neutral-point-clamped inverters; second-order distortion factor; semiconductor power loss distribution; symmetrical cascaded multilevel inverters; total harmonic distortion; voltage 4.16 kV; Induction-motor drives; inverters; multilevel systems; variable-speed drives;

fLanguage

English

Journal_Title

Industrial Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0278-0046

Type

jour

DOI

10.1109/TIE.2010.2040561

Filename

5409581