An Investigation of Electromagnetic Radiated Emission and Interference From Multi-Coil Wireless Power Transfer Systems Using Resonant Magnetic Field Coupling

Author

Sunkyu Kong ; Bumhee Bae ; Jung, Daniel H. ; Kim, Jonghoon J. ; Sukjin Kim ; Chiuk Song ; Jonghoon Kim ; Joungho Kim

Author_Institution

Electr. Eng. Dept., Korea Adv. Inst. of Sci. & Technol., Daejeon, South Korea

Volume

63

Issue

3

fYear

2015

fDate

Mar-15

Firstpage

833

Lastpage

846

Abstract

Wireless power transfer (WPT) technology has recently emerged as an innovative and promising technology, and its electromagnetic compatibility (EMC) has become a significant issue. In this study, we investigated the electromagnetic (EM) radiated emission and interference generated by WPT systems using resonant magnetic field coupling, especially in applications with multi-coil configurations. The change in coil resonance associated with multi-coil configurations was analyzed via the impedance profile. We measured the EM radiated emission and analyzed the results with respect to the coil resonance. An analog-to-digital converter chip was designed and fabricated to analyze the effect of electromagnetic interference (EMI). Based on measurement and simulation results, we verified that the EM radiated emission and interference increase at the series or parallel resonance peaks, depending on the source type. In addition, we verified that EMI can be reduced by using ferrite sheet shielding.

Keywords

analogue-digital conversion; electromagnetic compatibility; electromagnetic interference; inductive power transmission; magnetic fields; radiofrequency interference; EMC; EMI effect; WPT technology; analog-to-digital converter chip; coil resonance; electromagnetic compatibility; electromagnetic interference; electromagnetic radiated emission; ferrite sheet shielding; impedance profile; multicoil configurations; multicoil wireless power transfer systems; parallel resonance; resonant magnetic field coupling; series resonance; Coils; Couplings; Ferrites; Impedance; Integrated circuit modeling; Magnetic resonance; Analog-to-digital converters (ADCs); electromagnetic (EM) radiated emission; electromagnetic interference (EMI); resonance; wireless power transfer (WPT);

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/TMTT.2015.2392096

Filename

7021975