High frequency magnetic resonant coupling wireless power transfer system for middle power charging applications

This paper presents the design and implementation of a high frequency magnetic resonant coupling wireless power transfer (WPT) for middle power charging applications. The size and efficiency of resonator are depending on the resonant coupling frequency in the WPT system with magnetic resonant coupling. To improve the WPT efficiency, power capacity and resonator size, a high resonant coupling frequency is commonly desirable. However, the silicon based high frequency switching devices for middle power converter are limited. Also, power amplifier converter at high frequency has low efficiency. Therefore, this paper proposes a high frequency full-bridge inverter using Gallium Nitride (GaN) transistors for less than hundred watt charging applications. In order to verify the proposed system efficiency, simulation and experiments has been carried out.

[1]  M. Soljačić,et al.  Efficient wireless non-radiative mid-range energy transfer , 2006, physics/0611063.

[2]  Seungdeog Choi,et al.  High frequency wireless power transfer system for robot vacuum cleaner , 2014, 2014 IEEE International Conference on Consumer Electronics (ICCE).

[3]  Jong-Moo Lee,et al.  Circuit-Model-Based Analysis of a Wireless Energy-Transfer System via Coupled Magnetic Resonances , 2011, IEEE Transactions on Industrial Electronics.

[4]  Giulia Fanti,et al.  Wireless power transfer using weakly coupled magnetostatic resonators , 2010, 2010 IEEE Energy Conversion Congress and Exposition.

[5]  Jenshan Lin,et al.  High efficiency midrange wireless power transfer system , 2011, 2011 IEEE MTT-S International Microwave Workshop Series on Innovative Wireless Power Transmission: Technologies, Systems, and Applications.