| Summary: | 碩士 === 國立臺灣科技大學 === 電子工程系 === 107 === This thesis focuses on a wireless charging application with dual outputs and discusses the challenges with complex power generation. The series wireless power transfer (WPT) system architecture is used for analysis, design and implementation. Firstly, a brief introduction of the basic principles of WPT is given and the equivalent circuit models of loosely-coupled coils for WPT application are reviewed. The influence of the interaction coupling between the two two receiver coils on the whole system is analyzed using mathematical theory to calculate the operating frequency point at which the reactive impedance of the transmitter is zero. A design method that can guarantee normal operation of the dual-output WPT system under given coupling coefficient variation range, load range and allowed operating frequency range is proposed in this thesis, and can be used as a basis for experimental research. Finally, the circuit can be implemented and the output of the two sets of receivers can reach 30 W at the same time. The vertical distance between the transmitter coil and receiver coil is 10 mm, and the distance between two receiver coils has three different cases of 0 mm, 20 mm, and 40 mm. Finally, in each test condition, the circuit minimizes the reactiver power.
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