Neutral-point-clamped inverter with parallel driving of IGBTs for industrial applications

Author

Miyazaki, Hideki ; Fukumoto, Hideshi ; Sugiyama, Shigeru ; Tachikawa, Makoto ; Azusawa, Noboru

Author_Institution

Hitachi Ltd., Ibaraki, Japan

Volume

2

fYear

1997

fDate

5-9 Oct 1997

Firstpage

1293

Abstract

This paper describes the design and construction of a neutral point clamped (NPC) inverter and power converter, with outputs of 0.8, 1.6, and 3.2 MVA, which use IGBTs. The inverter and converter are suitable for industrial drive applications, such as rolling mills, water pumps, etc., and they are composed of multi-inverter units in parallel. Each inverter unit is composed of four pairs of parallel IGBTs connected in series. In order to achieve current balance among the parallel connected IGBTs, low inductance laminated bus bars are designed by using an electro-magnetic simulator, and switching waveforms of IGBTs are evaluated by the circuit simulator SPICE using power device models. A variable capacitance snubber circuit is also presented for the NPC inverter to reduce both switching voltage swing and power consumption

Keywords

DC-AC power convertors; SPICE; bipolar transistor switches; circuit analysis computing; insulated gate bipolar transistors; invertors; power bipolar transistors; power engineering computing; power semiconductor switches; power supplies to apparatus; snubbers; switching circuits; 0.8 MVA; 1.6 MVA; 3.2 MVA; SPICE; circuit simulator; current balance; electro-magnetic simulator; industrial applications; low-inductance laminated busbars; neutral-point-clamped inverter; parallel IGBTs; power consumption; rolling mills; switching voltage swing; switching waveforms; variable capacitance snubber circuit; water pumps; Bars; Capacitance; Circuit simulation; Construction industry; Inductance; Insulated gate bipolar transistors; Inverters; Milling machines; SPICE; Switching circuits;

fLanguage

English

Publisher

ieee

Conference_Titel

Industry Applications Conference, 1997. Thirty-Second IAS Annual Meeting, IAS '97., Conference Record of the 1997 IEEE

Conference_Location

New Orleans, LA

ISSN

0197-2618

Print_ISBN

0-7803-4067-1

Type

conf

DOI

10.1109/IAS.1997.629025

Filename

629025