Prof. Chun T. RIM,

Gwangju Institute of Science and Technology (GIST), Korea

Theories for Wireless Power Transfer



Rapid expanding technologies of wireless power transfer (WPT) to mobile devices and electric vehicles (EVs) make electric charging more convenient, safe, and automatic. WPT business and industries are growing fast, and more people are getting involved in this area. Innovation on WPT is highly sought in this area; however, no substantial progress in technology is possible without thorough and philosophical understanding of WPT. It is very often ignored and underestimated by engineers and practitioners, but theory is the basis of great innovation.

In this tutorial, an overview of WPT and its fundamental principles are introduced first. Several theories on inductive power transfer (IPT), mostly invented by Prof. RIM, are explained in detail, including the coupled coil models, gyrator circuit models, magnetic mirror models, active electro-magnetic force (EMF) cancel models, and general unified dynamic phasor models. A few application examples of IPT for dynamic and static EV charging and mobile devices are given.

This tutorial is based on Prof. RIM’s two new books, Phasor Power Electronics, Springer, 2016, and Wireless Power Transfer for Electric Vehicles and Mobile Devices, Wiley, 2017.


Biography of speaker:

Chun T. Rim (M’90–SM’11) received the B.S. degree with Honor in EE from the Kumoh Institute of Technology (KIT), Korea, in 1985, and the M.S. and Ph.D. degrees in EE from the Korea Advanced Institute of Science and Technology (KAIST), Korea, in 1987 and 1990, respectively. For 2007-2016, he was an associate professor at KAIST and now he is a full professor at the Gwangju Institute of Science and Technology (GIST), Korea. He has authored or coauthored 170 technical papers, written 16 books, and holds 160 patents (awarded and pending). He won numerous awards, including the Best Paper Award of IEEE TPEL in 2015 and J-ESTPE in 2016 both in wireless power transfer (WPT). He is now an associate editor of IEEE TPEL and the J-ESTPE, a guest editor of the Special Issue on WPT of the IEEE TPEL, TIE, and J-ESTPE, and the general (co-)chair of the 2015, 2016, 2017, and 2018 IEEE Workshop on Wireless power (WoW). He is an author of two new books, Phasor Power Electronics, Springer, 2016, and Wireless Power Transfer for Electric Vehicles and Mobile Devices, Wiley, 2017.


Prof. Grant Covic,

The University of Auckland, New Zealand

Electric vehicle wireless charging systems for both a stationary and dynamic future



The tutorial will give a sweeping overview of stationary electric vehicle wireless charging systems and finish with thoughts around the possibilities and future challenges of dynamic wireless charging. Starting with a brief history and fundamentals considered in design, it will move on to describe the simple light duty vehicle magnetics in use and the reasons. This will be followed by interoperable multi-coil topologies that may be suitable for high-power or misalignment tolerant applications and ferrite-less designs for in-road applications. The second half of the tutorial will discuss the vision of future roadway systems for both light and heavy duty applications, giving examples from the literature, and finish with an example of a taxi-rank evaluation system designed and developed at the University of Auckland. Recent successful dynamic trials undertaken by QualcommHalo will also be highlighted.


Biography of speaker:

Grant is a full professor at the University of Auckland. In the mid 90’s he began working with Prof. John Boys to develop the technology of resonant Inductive (contact-less) Power Transfer (IPT) for materials handling and electric vehicles (EVs) and in the early 2000’s they began jointly leading a team focused on AGV applications for traditional markets, and redeveloping EV charging solutions for private as well as public applications.

Today Grant’s research and consulting interests are focused on both industrial solutions using IPT and wireless charging of EVs under static and dynamic conditions. Over the past 15 years he has published more than 140 international refereed papers in this field, worked with over 40 postgraduates and filed over 40 patents, all of which are licensed to various global companies in specialised application fields.

In 2010 he co-founded (with John) a new global start-up company “HaloIPT” focusing on electric vehicle (EV) wireless charging infrastructure and was joint head of research from formation until sale. During this time HaloIPT received the Clean Equity Monaco award for excellence in the field of environmental engineering and two NZ clean innovation awards in the emerging innovator and design and engineering categories. Grant and John have been awarded the New Zealand Prime Minister’s Science Prize, the Vice Chancellors commercialisation medal and the KiwiNet research commercialisation awards for scientific research which has seen outstanding commercial success.

Grant is a senior member of IEEE and a Distinguished Lecturer of IEEE Transportation Electrification Community. He is also a fellow of both the Institution of Professional Engineers New Zealand, and the Royal Society of New Zealand. Presently he heads inductive power research at the UoA and co-leads the interoperability sub-team within the SAE J2954 wireless charging standard for EVs.