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


Vol. 13, No. 2, pp. 243-249, Mar. 2013
10.6113/JPE.2013.13.2.243


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 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.


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Cite this article

[IEEE Style]

U. Choi and K. Lee, "Neutral-Point Voltage Balancing Method for Three-Level Inverter Systems with a Time-Offset Estimation Scheme," Journal of Power Electronics, vol. 13, no. 2, pp. 243-249, 2013. DOI: 10.6113/JPE.2013.13.2.243.

[ACM Style]

Ui-Min Choi and Kyo-Beum Lee. 2013. Neutral-Point Voltage Balancing Method for Three-Level Inverter Systems with a Time-Offset Estimation Scheme. Journal of Power Electronics, 13, 2, (2013), 243-249. DOI: 10.6113/JPE.2013.13.2.243.