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.
Original language | English |
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Pages (from-to) | 243-249 |
Number of pages | 7 |
Journal | Journal of Power Electronics |
Volume | 13 |
Issue number | 2 |
DOIs | |
State | Published - Mar 2013 |
Keywords
- Multilevel
- Neutral-point voltage balancing
- NPC inverter