Author(s)

Yuelei Shen, Yue Ma, and Dafang Wang

Corresponding Author

Yuelei Shen

ABSTRACT

Three-level inverters possess the characteristics of higher voltage withstand, lower loss, lower harmonic and electromagnetic interference than two-level inverters. However, the neutral point potential fluctuation phenomenon not only causes the IGBT to withstand excessive voltage but also causes distortion of the output waveforms of the three-level inverters. This paper mainly discusses the imbalance of the neutral point potential under different modulation strategies of the three-level inverters and how to adjust can reduce the fluctuation of the neutral point potential.

KEYWORDS

Three-level inverters, of the neutral point potential