An improved voltage source inverter with 18-step output waveforms

Author

Iida, Shoji ; Masukawa, Shigeo ; Kubota, Yasumasa

Author_Institution

Tokyo Denki Univ., Japan

Volume

2

fYear

1996

fDate

6-10 Oct 1996

Firstpage

1250

Abstract

A new voltage source inverter with 18-step output waveforms is proposed in this paper in order to reduce harmonic components involved in the output voltages. Even though a conventional 18-step inverter employs three output transformers, the proposed circuit is no necessity for them. It is based on the neutral-point-clamped inverter composed of 12 switching devices. By dividing the DC voltage source into four pieces and adding four auxiliary switching devices, the proposed circuit can output almost the same waveforms as a conventional 18-step inverter. In this paper, the circuit performances are described and output waveforms are discussed. Then, the optimum parameters are derived and effects on harmonic reduction can be clarified by theoretical and experimental results. In addition, methods for adjusting output voltages are investigated

Keywords

invertors; power system harmonics; switching circuits; transformers; 18-step output waveforms; DC voltage source; harmonic components reduction; neutral-point-clamped inverter; output transformers; output voltages adjustment; voltage source inverter; Clamps; DSL; Diodes; Harmonic distortion; Pulse transformers; Pulse width modulation; Pulse width modulation inverters; Space vector pulse width modulation; Switching circuits; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Industry Applications Conference, 1996. Thirty-First IAS Annual Meeting, IAS '96., Conference Record of the 1996 IEEE

Conference_Location

San Diego, CA

ISSN

0197-2618

Print_ISBN

0-7803-3544-9

Type

conf

DOI

10.1109/IAS.1996.560237

Filename

560237