Ui-Min Choi and Kyo-Beum 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, Mar. 2013. -SCIE > Paper

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