Wireless power transfer (WPT) using magnetic
resonance is the technology which could set human free from
the annoying wires. In fact, the WPT adopts the same basic
theory which has already been developed for at least 30
years with the term inductive power transfer. WPT technology
is developing rapidly in recent years. At kilowatts
power level, the transfer distance increases from several millimeters
to several hundred millimeters with a grid to load
efficiency above 90%. The advances make the WPT very
attractive to the electric vehicle (EV) charging applications in
both stationary and dynamic charging scenarios. This paper
reviewed the technologies in the WPT area applicable to
EV wireless charging. By introducing WPT in EVs, the obstacles
of charging time, range, and cost can be easily mitigated. Battery
technology is no longer relevant in the mass market penetration
of EVs. It is hoped that researchers could be encouraged by
the state-of-the-art achievements, and push forward the further
development of WPT as well as the expansion of EV.