A soft commutated neutral-point-clamped (NPC) inverter: theory and experimentation

Author

Yuan, Xiaoming ; Barbi, Ivo

Author_Institution

Power Electron. Inst., Fed. Univ. of Santa Catarina, Florianopolis, Brazil

Volume

2

fYear

1998

fDate

15-19 Feb 1998

Firstpage

537

Abstract

A soft commutation circuit aimed to substitute for the conventional snubber in a GTO NPC inverter is presented in this paper. The small rating lossless auxiliary branch creates soft switching conditions for the main devices without having to subject them to extra voltage/current spikes or any modulation constraints. Hence it allows for considerable extension of the power range and the frequency range of the main installation. Operation, analysis, and designing of the circuit as well as the experimental results from a prototype are detailed in the paper

Keywords

commutation; invertors; switching circuits; commutation analysis; frequency range extension; power range extension; small rating lossless auxiliary branch; soft commutated neutral-point-clamped inverter; soft commutation circuit; soft switching; Circuits; Diodes; Inductors; Pulse width modulation; Pulse width modulation inverters; Resonance; Snubbers; Switching frequency; Transducers; Zero voltage switching;

fLanguage

English

Publisher

ieee

Conference_Titel

Applied Power Electronics Conference and Exposition, 1998. APEC '98. Conference Proceedings 1998., Thirteenth Annual

Conference_Location

Anaheim, CA

Print_ISBN

0-7803-4340-9

Type

conf

DOI

10.1109/APEC.1998.653827

Filename

653827