Abstract
Wireless power transfer (WPT) technique will become a hot development trend of the energy supply system for electric vehicles (EV). Compared with plug-in hybrid electrical charging systems, WPT has superior characteristics in small size battery, lightweight, short charging time (charging-in-motion services), and long driving range, etc. This paper mainly introduces the basic frame and the classification of the WPT system and then reviews the basic principles of popular WPT technique, named electromagnetic resonant coupling transfer (ERCT) brief. The basic components of the ERCT, coil, compensation topology, power electronics converters and control methods are given a brief introduction. The real-world applications are shown through examples that the WPT system is feasible, but also meet unsolved problems or difficulties. At last, some superficial improved is presented.
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