Five-level inverter scheme for an open-end winding induction machine with less number of switches

Author

Figarado, S. ; Sivakumar, K. ; Ramchand, Rijil ; Das, Aruneema ; Patel, Chirag ; Gopakumar, K.

Author_Institution

CEDT, Indian Inst. of Sci., Bangalore, India

Volume

3

Issue

4

fYear

2010

fDate

7/1/2010 12:00:00 AM

Firstpage

637

Lastpage

647

Abstract

Higher level of inversion is achieved with a less number of switches in the proposed scheme. The scheme proposes a five-level inverter for an open-end winding induction motor which uses only two DC-link rectifiers of voltage rating of V_dc/4, a neutral-point clamped (NPC) three-level inverter and a two-level inverter. Even though the two-level inverter is connected to the high-voltage side, it is always in square-wave operation. Since the two-level inverter is not switching in a pulse width modulated fashion and the magnitude of switching transient is only half compared to the convention three-level NPC inverter, the switching losses and electromagnetic interference is not so high. The scheme is experimentally verified on a 2.5 kW induction machine.

Keywords

induction motors; invertors; switching convertors; DC-link rectifiers; electromagnetic interference; five-level inverter scheme; induction machine; neutral-point clamped three-level inverter; open-end winding induction motor; power 2.5 kW; square-wave operation; switch number reduction; switching losses; switching transient; two-level inverter;

fLanguage

English

Journal_Title

Power Electronics, IET

Publisher

iet

ISSN

1755-4535

Type

jour

DOI

10.1049/iet-pel.2009.0058

Filename

5497970