用于WPT系统的一次侧失谐SS型补偿拓扑及其参数设计方法

发布时间：2018-05-13 16:02

本文选题：无线电能传输 + 串串补偿　；参考：《电工技术学报》2017年18期

【摘要】：无线电能传输系统的拓扑需在宽耦合系数范围内具有平稳传输功率的能力,传统的全谐振串串补偿拓扑对耦合系数较敏感,功率波动程度较大,不适合用于耦合系数变化剧烈的场合,且存在轻载安全问题。本文提出一种一次侧失谐的串串补偿拓扑,分析在一次侧失谐情况下的系统传输功率特性,结果表明该拓扑具有较强的抗偏移能力,且不存在轻载安全问题。考虑额定功率和功率波动程度两个约束条件,对补偿拓扑的相关参数进行设计,并对全谐振拓扑和失谐拓扑进行补偿电容容值及电池荷电状态(SOC)的敏感性对比,讨论一次侧失谐设计对谐振腔效率的影响。最后搭建150W的实验平台,对该抗偏移特性进行验证。实验结果表明在两倍的耦合系数变化内,系统的输出功率波动程度能保持在20%以内,且系统效率维持在76%以上。
[Abstract]:The topology of radio energy transmission system needs to have the ability to transmit power stably in the wide coupling coefficient range. The traditional full resonant series compensation topology is sensitive to the coupling coefficient and has a large power fluctuation. It is not suitable for the situation where the coupling coefficient varies sharply, and there are light load safety problems. In this paper, a series compensation topology of primary side detuning is proposed, and the transmission power characteristics of the system under the condition of primary side detuning are analyzed. The results show that the topology has strong anti-migration ability and no light load security problem. Considering the two constraints of rated power and power fluctuation degree, the related parameters of compensation topology are designed, and the sensitivity of compensation capacitance capacity and battery charge state SOC are compared between full resonant topology and detuned topology. The effect of primary side detuning design on cavity efficiency is discussed. Finally, a 150 W experimental platform is built to verify the anti-migration characteristic. The experimental results show that the output power fluctuation of the system can be kept within 20% and the system efficiency is over 76% when the coupling coefficient changes twice.
【作者单位】：强电磁工程与新技术国家重点实验室(华中科技大学);
【基金】：国家自然科学基金国际(地区)合作与交流项目(51361130150)资助
【分类号】：TM724

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