Date of Award
Fall 2025
Document Type
Open Access Thesis
Department
Electrical Engineering
First Advisor
David W. Matolak
Abstract
Switching power converters are increasingly utilized in contemporary electronics. They are becoming more compact and operate at higher frequencies, which contributes to radiated electromagnetic interference (EMI). This EMI is important to quantify for electromagnetic compatibility of the converters with other nearby systems. In this thesis, analytical models have been developed for both ideal and non-ideal switching waveforms, employing piecewise functions to describe time-domain waveforms, with their corresponding frequency spectra derived and compared to empirical spectra. The results demonstrate that the comparisons with measured frequency data exhibit agreement with the analytical models up to approximately 25 MHz. Additionally, our analysis indicates that external sources, beyond the power converters, generate radiated emissions within the 30 – 50 MHz range. Ambient measurement assessments confirm that equipment such as auxiliary power systems contribute to this increased electromagnetic emission.
Rights
© 2025, Regan A. Varner
Recommended Citation
Varner, R. A.(2025). Spectral Modeling of Electromagnetic Radiation From Power Converters. (Master's thesis). Retrieved from https://scholarcommons.sc.edu/etd/8690