Design and Comparison of Inductors and Intercell Transformers for Filtering of PWM Inverter Output

Author

Forest, François ; Laboure, Eric ; Meynard, Thierry A. ; Smet, Vanessa

Author_Institution

Inst. d´´Electron. du Sud, Univ. de Montpellier II, Montpellier

Volume

24

Issue

3

fYear

2009

fDate

3/1/2009 12:00:00 AM

Firstpage

812

Lastpage

821

Abstract

This paper presents an original design option dedicated to output-filtered pulsewidth modulation inverters used in uninterruptible power systems, embedded networks, or motor drives operating on long cables. It is based on the coupling of interleaved inverter cells by means of intercell transformers (ICTs) and is characterized by very good dynamic behavior on load transients, which is an important issue in such applications. ICT solutions are compared with the classical interleaved solutions using separate inductors. A specific design method is developed to achieve this comparison based on toroidal core shapes. The results obtained with a 600 V, 7.5 kW inverter show the usefulness of ICT-based designs, especially when nanocrystalline magnetic material is used; high specific power and very good dynamic performances are obtained.

Keywords

PWM invertors; filtering theory; motor drives; power cables; power inductors; power transformers; uninterruptible power supplies; PWM inverter output; cables; embedded networks; inductors; intercell transformers; interleaved inverter cell coupling; load transient; motor drives; nanocrystalline magnetic material; output-filtered pulsewidth modulation inverters; power 7.5 kW; uninterruptible power systems; voltage 600 V; Embedded converters; intercell transformer (ICT); interleaved inverters; uninterruptible power system (UPS);

fLanguage

English

Journal_Title

Power Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0885-8993

Type

jour

DOI

10.1109/TPEL.2008.2007900

Filename

4768693