Details

Autor(en) / Beteiligte

• Teng, Jiaxun
• Sun, Xiaofeng
• Wang, Zizhe
• Fu, Huanshuai
• Zhao, Wei
• Qi, Lei
• Li, Xin

Titel

Nose-to-Tail Modulation of Three-Phase 12N Switching-Cells Inverter for Zero Common Mode Voltage

Ist Teil von

• IEEE transactions on power electronics, 2023-11, p.1-5

Ort / Verlag

IEEE

Erscheinungsjahr

2023

Quelle

IEEE/IET Electronic Library (IEL)

Beschreibungen/Notizen

• Aiming at a class of transformerless three-phase DC/AC inverters with N times of 12 switching-cells, this letter proposes a novel nose-to-tail modulation (NTM) method which can realize zero common-mode voltage (CMV). The NTM algorithm places the driving pulses nose-to-tail of the six conversion units in the upper/lower arms, so as to realize the same number of units put into the upper and lower arms at any time. In addition, a dead-time compensation scheme achieving the elimination of narrow pulse CMV caused by dead-time is also proposed for NTM. As a result, the zero CMV can be achieved. Although the proposed NTM slightly increases the modulation complexity, it is of great significance in CMV sensitive systems such as grid-tied and motor drive systems. The effectiveness of the proposal is verified by experiments.