Implementation of frequency-modulated triangular carrier and slope PWM strategies for three-level NPC inverters

Author

Rosu, S.G. ; Florescu, Adrian ; Odhano, S.A. ; Bojoi, Radu Iustin ; Tenconi, Alberto

Author_Institution

Dept. of Appl. Electron. & Inf. Eng., Univ. Politeh. of Bucharest, Bucharest, Romania

fYear

2014

fDate

22-24 May 2014

Firstpage

570

Lastpage

575

Abstract

Multilevel inverters produce an output voltage with superior quality compared to the voltage obtained by two-level converters. They are controlled with pulse width modulation (PWM) methods and have a limited switching frequency due to semiconductor devices switching losses. This paper presents the implementation for multilevel converters of two generated PWM methods that were previously proposed for two level converters. The considered methods, sinusoidal carrier regulated by the slope of a trapezoidal waveform PWM (SLPWM) and frequency modulated triangular carrier PWM (HIPWM-FMTC), control the output voltage spectrum while keeping the number of commutations low for a given fundamental frequency.

Keywords

PWM invertors; PWM power convertors; power semiconductor devices; HIPWM-FMTC; PWM methods; SLPWM; frequency-modulated triangular carrier; limited switching frequency; multilevel inverters; output voltage spectrum; pulse width modulation methods; semiconductor devices switching losses; slope PWM strategies; three-level NPC inverters; trapezoidal waveform PWM; Capacitors; Frequency modulation; Harmonic analysis; Inverters; Power harmonic filters; Pulse width modulation;

fLanguage

English

Publisher

ieee

Conference_Titel

Optimization of Electrical and Electronic Equipment (OPTIM), 2014 International Conference on

Conference_Location

Bran

Type

conf

DOI

10.1109/OPTIM.2014.6851027

Filename

6851027