Hongseok Kim, Jonghoon J. Kim, Seungtaek Jeong, Seongsoo Lee, Yeonje Cho, Dong-Hyun Kim, Joungho Kim
{"title":"EMI reduction in wireless power transfer system using spread spectrum frequency dithering","authors":"Hongseok Kim, Jonghoon J. Kim, Seungtaek Jeong, Seongsoo Lee, Yeonje Cho, Dong-Hyun Kim, Joungho Kim","doi":"10.1109/WPT.2016.7498855","DOIUrl":null,"url":null,"abstract":"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.","PeriodicalId":113182,"journal":{"name":"2016 IEEE Wireless Power Transfer Conference (WPTC)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2016-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"11","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2016 IEEE Wireless Power Transfer Conference (WPTC)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/WPT.2016.7498855","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 11
Abstract
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.