A randomized voltage vector switching scheme for three-level power inverters

Author

Lee, C.K. ; Hui, S.Y.R. ; Chung, H. Shu-Hung ; Shrivastava, Yash

Author_Institution

Dept. of Electron. Eng., City Univ. of Hong Kong, Kowloon, China

Volume

17

Issue

1

fYear

2002

fDate

1/1/2002 12:00:00 AM

Firstpage

94

Lastpage

100

Abstract

In this paper, a feasibility study of a randomized space vector switching scheme for three-level inverters is reported. Based on the traditional space vector concept for pulse width modulation (PWM) inverters, the sequence of the space vector is randomized in this scheme. The overall vector, resulting from the randomization, is mathematically identical to that of the traditional space vector. It has been found that the randomized scheme can effectively spread the switching noise over a wide frequency range and at the same time keep the steady-state link capacitor voltage balanced. The proposed scheme has been implemented in real time in a digital controller and its features have been experimentally confirmed

Keywords

DC-AC power convertors; PWM invertors; switching; switching circuits; digital control; pulse width modulation; randomized voltage vector switching scheme; space vector concept; steady-state link capacitor voltage balance; switching noise reduction; three-level power inverters; Acoustic applications; Acoustic noise; Capacitors; Power system harmonics; Pulse inverters; Pulse width modulation; Pulse width modulation inverters; Space vector pulse width modulation; Switching frequency; Voltage;

fLanguage

English

Journal_Title

Power Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0885-8993

Type

jour

DOI

10.1109/63.988674

Filename

988674