A three phase 3-level inverter with reduced THD factor J.Iwaszkiewicz and A.Muc   2018/04/20

Abstract

The paper presents an mathematical analysis of a stepped function denoted as fN=6.This function describes precisely an output voltage waveform of a 3-level inverter. The analysis proves that cascaded inverters give a very good performance of the output voltage according to a criterion of minimal THD. Optimal parameters are indicated in the paper. They permit to diminish the THD factor to a level below 21% while in standard NPC inverters such a result requires special treatment.

Authors and affiliations

J.Iwaszkiewicz1 and A.Muc1
1. Department of Electrical Engineering. Gdynia Maritime University. Gdynia (Poland)

Key words

THD factor, cascaded inverters, NPC inverters.

References

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