Impact of PWM modulation schemes on common-mode voltage generated by 3-level neutral-point-clamped inverters

Name: Pennapa Pairodamonchai

Organization : King Mongkut's University of Technology North Bangkok. dept. of Electrical and Computer Engineering

Email : pennapa.p@eng.kmutnb.ac.th

keyword: Common-mode voltage

ThaSH: Modulation (Electronics)

; Zero-sequence voltages

ThaSH: Electric inverters

; Three-Level NPC Inverter

; Third Harmonic Injection

; Switching Losses

Abstract: This paper presents a comparative study on the impacts of various carrier-based PWM modulation schemes in terms of common-mode voltages generated by 3-level neutral-point- clamped inverters. In these modulation techniques, various third harmonic voltage are injected into reference sinusoidal voltages to improve modulation index, switching losses and harmonics quality. The simulation results of the common-mode voltage waveforms and their spectrums show that injected zero sequence voltages can directly affect the generated common-mode voltages, not only in the range of harmonic frequencies, which are the frequencies of the zero sequence signal, but also in the high-frequency range, which can potentially cause EMI problems.

King Mongkut's University of Technology North Bangkok. Central Library

Address: BANGKOK

Email: library@kmutnb.ac.th

Created: 2018

Modified: 2025-10-30

Issued: 2025-10-30

บทความ/Article

application/pdf

BibliograpyCitation : In King Mongkut's University of Technology North Bangkok College of Industrial Technology. The Proceedings of the International Conference on Engineering Science and Innovative Technology (ESIT 2018) (171). Bangkok : King Mongkut's University of Technology North Bangkok

eng

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