EMI Reduction in Wireless Power Transfer System using Spread Spectrum Frequency Dithering
This paper presents the use of spread spectrum technique to reduce electromagnetic interference caused by fast switching transitions of a resonant inverter and rectifier used for wireless power transfer (WPT) systems. We investigate the magnetic field emission from a series-resonant WPT system having the resonance frequency of 20 kHz in a frequency band from 9 kHz to 150 kHz. The averaging spectral estimate (Welch's Periodogram) of the simulated leakage magnetic field shows that a harmonic peak can be reduced up to 8.7 dB by dithering the switching frequency with a triangular modulation profile.
H. Kim et al., "EMI Reduction in Wireless Power Transfer System using Spread Spectrum Frequency Dithering," Proceedings of the 2016 IEEE Wireless Power Transfer Conference (2016, Aveiro, Portugal), Institute of Electrical and Electronics Engineers (IEEE), May 2016.
The definitive version is available at https://doi.org/10.1109/WPT.2016.7498855
2016 IEEE Wireless Power Transfer Conference, WPTC 2016 (2016: May 5-6, Aveiro, Portugal)
Electrical and Computer Engineering
Electromagnetic Compatibility (EMC) Laboratory
Keywords and Phrases
Electric power systems; Electric rectifiers; Electromagnetic pulse; Frequency bands; Interference suppression; Magnetic fields; Magnetic leakage; Spectroscopy, Leakage magnetic field; Resonance frequencies; Resonant inverters; Spectral estimate; Spread spectrum techniques; Triangular modulations; Wireless power transfer; Wireless power transfer (WPT), Inductive power transmission
International Standard Book Number (ISBN)
Article - Conference proceedings
© 2016 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.
01 May 2016