Parallel connections of pulsewidth modulated NPC converters using current sharing reactors

Author

Matsui, Keiju ; Ueda, Fukashi ; Tsuboi, Kazuo ; Iwata, Koji ; Kobayashi, Tadashi

Author_Institution

Dept. of Electr. Eng., Chubu Univ., Kasugai, Japan

Volume

3

fYear

1996

fDate

5-10 Aug 1996

Firstpage

1776

Abstract

A technique of parallel connection of power devices by using current sharing reactors for NPC-PWM inverters is reported in this paper, in which a certain modulation technique is discussed. This proposed modulation technique can not only increase current capacity and the output voltage level but also decrease the output harmonic contents. The output voltage waveforms of the proposed inverter have certain voltage levels during their half cycles, thus it is anticipated that it will be difficult to analyze the output waveforms. For such waveforms, a frequency analysis approach is described, whose results are verified by experiments

Keywords

PWM invertors; power system harmonics; reactors (electric); current capacity; current sharing reactors; frequency analysis approach; half cycles; neutral point clamped inverters; output harmonic contents decrease; output voltage level increase; output voltage waveforms; parallel connection; pulsewidth modulated NPC converters; AC motors; Circuits; Diodes; Frequency; Inductors; Pulse inverters; Pulse modulation; Pulse width modulation inverters; Switches; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Industrial Electronics, Control, and Instrumentation, 1996., Proceedings of the 1996 IEEE IECON 22nd International Conference on

Conference_Location

Taipei

Print_ISBN

0-7803-2775-6

Type

conf

DOI

10.1109/IECON.1996.570731

Filename

570731