ARCPI resonant snubber for the neutral-point-clamped (NPC) inverter

Author

Yuan, Xiaoming ; Orglmeister, Gunthard ; Barbi, Ivo

Author_Institution

Power Electron. & Electrometrol. Lab., Swiss Federal Inst. of Technol., Zurich, Switzerland

Volume

2

fYear

1999

fDate

1999

Firstpage

1157

Abstract

This paper reports a resonant snubber for the neutral-point-clamped (NPC) inverter using the auxiliary resonant-commutated-pole-inverter (ARCPI) technique. The proposal guarantees zero voltage switching of the main switches and zero current switching of the auxiliary switches without incurring any voltage or current spikes across or through the main switches and without subjecting to any modulation constraints. Operation principle of the ARCPI NPC inverter is illustrated. A simple method dealing with the static overvoltage problem of the inner switches is described. Commutation durations and current stresses in the basic ARCPI circuit are analyzed. The results enable mathematical understanding and practical designing of the basic ARCPI circuit. In particular, self balancing quality and controlling possibility of the DC center potential in the basic ARCPI circuit are investigated. The proposal is verified by a 3 kW half bridge ARCPI NPC inverter laboratory prototype

Keywords

DC-AC power convertors; bridge circuits; commutation; invertors; resonant power convertors; snubbers; switching circuits; 3 kW; auxiliary resonant-commutated pole inverter; auxiliary switches; commutation duration; current stresses; half-bridge ARCPI NPC inverter; main switches; neutral point clamped inverter; operation principle; resonant snubbers; static overvoltage problem; zero current switching; zero voltage switching; Circuits; Inverters; Proposals; Resonance; Snubbers; Stress; Switches; Voltage control; Zero current switching; Zero voltage switching;

fLanguage

English

Publisher

ieee

Conference_Titel

Industry Applications Conference, 1999. Thirty-Fourth IAS Annual Meeting. Conference Record of the 1999 IEEE

Conference_Location

Phoenix, AZ

ISSN

0197-2618

Print_ISBN

0-7803-5589-X

Type

conf

DOI

10.1109/IAS.1999.801650

Filename

801650