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http://dx.doi.org/10.6113/JPE.2013.13.2.243

Neutral-Point Voltage Balancing Method for Three-Level Inverter Systems with a Time-Offset Estimation Scheme  

Choi, Ui-Min (Dept. of Electrical and Computer Eng., Ajou University)
Lee, Kyo-Beum (Dept. of Electrical and Computer Eng., Ajou University)
Publication Information
Journal of Power Electronics / v.13, no.2, 2013 , pp. 243-249 More about this Journal
Abstract
This paper presents a neutral-point voltage balancing method for three-level inverter systems using a time-offset estimation scheme. The neutral-point voltage is balanced by adding a time-offset to the turn-on time of the switches. If an inaccurate time-offset is added, the neutral-point deviation still remains. An accurate time-offset is obtained through the proposed time-offset estimation scheme. This method is implemented without additional hardware, complex calculations, or analysis. The effectiveness of the proposed method is verified by experiments.
Keywords
Multilevel; Neutral-point voltage balancing; NPC inverter;
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Times Cited By KSCI : 2  (Citation Analysis)
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