Modeling and analysis of magnetically coupled resonant wireless power transfer system with rectifier bridge LED load

Summary The system of magnetically coupled resonant wireless power transfer (MCR-WPT) for a rectifier bridge light-emitting diode (LED) load is modeled, and its transmission characteristics for different LED arrays are analyzed and validated in this paper. On the basis of the derived equivalent steady-state circuit model consisting of the high-frequency alternating current source, the WPT networks and the rectifier bridge LED load, transmission efficiency and transmission distance related to the LED connection forms are obtained in theory. In our concerned scheme, the total power of LED arrays is chosen as its rated one so as to guarantee a rated current of each LED. More accurate system parameters are measuring, and some theoretical results for two feasible connection forms of LED arrays are validated in experiment. The theoretical and experimental results at the two working points are consistent approximately, which validates the feasibility of the derived equivalent circuit model of the concerned MCR-WPT system. Copyright © 2014 John Wiley & Sons, Ltd.