A Dual Seven-Level Inverter Supply for an Open-End Winding Induction Motor Drive

Author

Mondal, Gopal ; Sivakumar, K. ; Ramchand, Rijil ; Gopakumar, K. ; Levi, Emil

Author_Institution

Sch. of Electr. & Electron. Eng., Univ. of Nottingham, Nottingham

Volume

56

Issue

5

fYear

2009

fDate

5/1/2009 12:00:00 AM

Firstpage

1665

Lastpage

1673

Abstract

This paper develops a seven-level inverter structure for open-end winding induction motor drives. The inverter supply is realized by cascading four two-level and two three-level neutral-point-clamped inverters. The inverter control is designed in such a way that the common-mode voltage (CMV) is eliminated. DC-link capacitor voltage balancing is also achieved by using only the switching-state redundancies. The proposed power circuit structure is modular and therefore suitable for fault-tolerant applications. By appropriately isolating some of the inverters, the drive can be operated during fault conditions in a five-level or a three-level inverter mode, with preserved CMV elimination and DC-link capacitor voltage balancing, within a reduced modulation range.

Keywords

induction motor drives; invertors; DC-link capacitor voltage balancing; common-mode voltage elimination; fault conditions; inverter control; neutral-point-clamped inverters; open-end winding induction motor drive; seven-level inverter supply; three-level inverter mode; Capacitor voltage balancing; common-mode voltage (CMV) elimination; multilevel inverter; open-end winding induction motor;

fLanguage

English

Journal_Title

Industrial Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0278-0046

Type

jour

DOI

10.1109/TIE.2008.2010159

Filename

4689396