Optimization Procedure of Complex Permeability for a Wireless Power Transfer System
Wireless power transfer (WPT) is fundamentally based on Faraday's law of induction and uses relatively strong magnetic field to transfer the required power from the source to the load without any electrical contact. To reduce the leakage magnetic field and enhance the magnetic coupling between the coils, soft magnetic material such as ferrite is frequently used. However, it is hard to determine the optimum magnetic properties to meet the various design requirements such as the cost, the efficiency and the regulations for the time-varying electromagnetic field (EMF) exposure. In this paper, we present the procedure to find the optimum complex permeability satisfying the following design requirements: the transfer efficiency of 90% and the minimum levels of EMF around the coils. The results show that solely maximizing the real part of complex permeability or minimizing the magnetic loss tangent is unsuitable to meet the given design requirements for the WPT system.
H. Kim et al., "Optimization Procedure of Complex Permeability for a Wireless Power Transfer System," Proceedings of the 2013 Asia-Pacific Symposium on Electromagnetic Compatibility (2013, Melbourne, Australia), Institute of Electrical and Electronics Engineers (IEEE), May 2013.
The definitive version is available at https://doi.org/10.1109/APEMC.2013.7360658
Asia-Pacific Symposium on Electromagnetic Compatibility, APEMC 2013 (2013: May 20-23, Melbourne, Australia)
Electrical and Computer Engineering
Keywords and Phrases
Complex Permeability; Electromagnetic Field; Ferrite; Magnetic Material; Wireless Power Transfer
International Standard Book Number (ISBN)
Article - Conference proceedings
© 2013 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.
23 May 2013