基于跳频控制策略的串联-串联谐振无线电能传输系统的参数优化设计方法

无线电能传输是一种方便、安全的电能传输方式。以实现蓄电池快速无线充电的串联-串联(SS)型谐振无线电能传输系统为研究对象,设计蓄电池三段式充电曲线,提出一种与之相对应的分段跳频控制策略。根据蓄电池充电曲线特征、SS谐振网络的恒压恒流特性和分段跳频控制策略,提出一种适用于蓄电池全范围充电的谐振网络参数优化设计的方法,为无线电能传输系统参数的优化设计提供了理论依据。搭建SS谐振无线电能传输装置,验证了参数选择的合理性和控制策略的有效性。在一次、二次侧之间距离12.5cm下,该装置实现了蓄电池的全范围三段式充电,并且整机效率最优达到93.5%。

The Optimal Design Methodology of Series-Series Resonant Tank Parameters of Wireless Power Transmission System Based on Leap Frequency Control Strategy

Wireless power transmission is a kind of electric power transmission method for convenience and safety. The series-series (SS) resonant wireless power transmission system (WPTS) for rapid battery charging is studied as the research object in this paper. Accordingly, a three-section charging curve is designed, and the corresponding leap-frequency control strategy (LFCS) is proposed. Based on the characteristics of battery charging curves, according to the features of constant voltage and constant current in resonant network as well as LFCS, this paper provides an optimal design methodology of resonant network parameter. It can provide the theoretical basis for design and optimization of resonant network parameters of WPTS. A wireless power transmission equipment which adopts SS compensation is designed to validate rationality of the selected parameters and effectiveness of LFCS. The equipment can realize three-section charging in the whole range of the battery, and the overall maximum efficiency can achieve 93.5％ with the air gap of 12.5cm.