磁耦合谐振式无线电能传输技术在近年来得到了飞速发展，但目前在功率等级、功率密度以及配置灵活性等方面仍有较大提升空间。模块化组合思想是解决上述问题的有效手段之一，其不同组合方法可带来不同方面的性能提升。例如串并联模块组合可实现高频变换单元的功率扩容，突破电力电子功率开关器件的容量限制；倍频组合可提高系统谐振频率，从而减小线圈体积，提高系统功率密度，亦或降低单个器件的开关频率，进而降低功率器件性能需求，实现低成本化；此外模块化的设计理念可以大大提升系统配置的灵活性，为未来标准化、批量化生产提供助力。无线电能传输系统中高频变换器和谐振网络联系紧密，高频变换单元的模块化组合需要谐振网络接口与之相适应。双边LCC谐振拓扑具有适应模块化组合等优点，但针对LCC谐振拓扑的控制稳定性研究仍存在不足。本文通过稳动态分析推导了双边LCC谐振拓扑下双向功率稳定传输条件，建立其全系统小信号模型，在控制稳定性分析的基础上，总结双边LCC谐振元件和变换器直流滤波环节参数设计方法，通过仿真和实验验证了上述模型与设计方法的有效性。双边LCC谐振拓扑元件参数自由度多，相互联系紧密，对其优化设计时需要考虑各谐振元件与传输线圈参数之间的关系。本文基于平板线圈电感解析化计算模型，探究线圈设计因素对谐振网络损耗和元件体积变化的影响，概括线圈优化设计规律。针对模块化组合需要，设计高频变换单元，针对样机设计的工程实际进行传输线圈-谐振网络联合优化设计，研制了4kW单元模块和10kW模块组合两套样机。实验验证了样机的功能、性能及其模块化扩容组合能力。作为模块化组合的另一个分支，本文还对高频变换单元倍频组合技术开展研究。首先通过理论和实验验证了倍频组合的可行性；然后针对倍频组合带来的频率提升能力，将谐振频率作为优化变量开展研究，建立了变换器、谐振网络和传输线圈全系统损耗模型，将开关频率和谐振频率不同的工况纳入考虑，分析了系统损耗随谐振频率的变化趋势，之后以降低损耗和减小接收端体积为优化目标，得出了谐振频率和高频谐振网络的优化设计方法，验证了模块化倍频组合的可行性和性能优势。
Magnetic coupling resonance wireless energy transmission (MCR-WPT) technology has been developed rapidly in recent years, but there is still much room for improvement in terms of power level, power density and configuration lexibility. The idea of modular combination is one of the effective means to solve the above problems, and its different combination methods can bring different aspects of performance improvement. For example, series or parallel module combination can realize the power expansion of high-frequency conversion units, breaking through the capacity limit of power electronic power switching devices; frequency doubling combination can improve the resonant frequency of the system, thus reducing the coil volume, improving the system power density, or reducing the switching frequency of individual devices, thus reducing the performance requirements of power devices and achieving low cost; in addition, the modular design concept can greatly enhance the system configuration In addition, the modular design concept can greatly enhance the flexibility of the system configuration, and provide assistance for future standardization and mass production. The high frequency converter and resonant network are closely linked in the WPT system, and the modular combination of high frequency converter units requires the resonant network interface to adapt to it. The bilateral LCC resonant topology has the advantages of adapting to the modular combination, but there is still a shortage of control stability research for the LCC resonant topology. In this paper, the bi-directional power stability transmission conditions under bilateral LCC resonant topology are derived through steady-state and dynamic analysis. Summarizing the design methods of bilateral LCC resonant elements and converter DC filter link parameters based on the control stability analysis, its full-system small-signal model is established. The effectiveness of the above models and design methods is verified through simulation and experiment. The resonant topological elements of bilateral LCC have many degrees of freedom and are closely interconnected, and the relationship between each resonant element and transmission coil parameters needs to be considered for their optimal design. This work explores the influence of coil design factors on resonant network loss and element volume variation based on the analytic calculation model of flat coil inductance, and outlines the coil optimization design law. For the modular combination, the high frequency conversion unit is designed, and the joint optimized design of transmission coil and resonant network is carried out for the engineering reality of the prototype design, and two sets of prototypes, 3.3kW unit module and 10kW module combination are developed. The functions and performance of the prototypes and their modular expansion and combination capabilities are verified experimentally. As another branch of modular combination, this work also investigates the frequency doubling combination technology of high frequency converter unit. Firstly, the feasibility of frequency doubling combination is verified through theory and experiment; then, the resonant frequency is studied as the optimization variable for the frequency boosting ability brought by frequency doubling combination, and the loss model of the whole system of converter, resonant network and transmission coil is established, the operating conditions with different switching frequency and resonant frequency are taken into consideration, and the change trend of system loss with resonant frequency is analyzed, after which the loss reduction and the reduction of receiver After that, the optimized design method of resonant frequency and high-frequency resonant network is derived, and the feasibility and performance advantages of the modular frequency multiplier combination are verified.
