A new three-phase 5-level current-source inverter

The new three-phase 5-level current-source inverter （CSI） proposed in this paper was developed by connecting three separate single-phase 5-level CSIs in series, and its operational principle was analyzed. There are two major problems existing in current-source multilevel inverters, one is the comple...

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Bibliographic Details
Published in:Journal of Zhejiang University. A. Science 2006-12, Vol.7 (12), p.1973-1978
Main Authors: Bao, Jian-yu, Bai, Zhi-hong, Wang, Qing-song, Zhang, Zhong-chao
Format: Article
Language:English
Subjects:
CSI
和声学
电源逆变器
脉宽调制
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Summary:The new three-phase 5-level current-source inverter （CSI） proposed in this paper was developed by connecting three separate single-phase 5-level CSIs in series, and its operational principle was analyzed. There are two major problems existing in current-source multilevel inverters, one is the complex PWM control method （2-logic to 3-logic conversion）, and the other is the problem of current-unbalance between different levels. A simple current-balance control method via DC current feedback is applied in each single-phase 5-level CSI cell to implement the current-balance control between different levels. And to reduce the output current harmonics, POD PWM control technique was used. Simulation and experimental results showed that this new three-phase 5-level CSI topology operates correctly.
ISSN:1673-565X
1862-1775
DOI:10.1631/jzus.2006.A1973