LCC-LC串联混合型抗偏移恒流无线充电

doi:10.19595/j.cnki.1000-6753.tces.210124

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摘要针对电动汽车无线充电线圈偏移造成充电电流不稳定和效率低的问题,提出基于参数优化的LCC-LC串联混合型抗偏移恒流无线充电设计方法。建立LCC和LC补偿网络的数学模型,分析二者电流输出特性,得到LCC输出电流与互感呈正相关,LC输出电流与互感呈负相关。采用DDQ线圈结构,解决初级、次级线圈同侧解耦及异侧解耦控制,实现LCC和LC均与负载无关的独立恒流输出;通过系统参数优化选择合适的谐振网络参数,采用串联混合结构实现补偿网络电压输入互补,进而使系统具有抗偏移恒流输出能力。最终搭建310W实验样机,验证系统恒流抗偏移输出效果。实验结果表明,在横向偏移50%范围下系统输出电流仍能保持较好的稳定性,在设定值的5%范围内波动,并且最高效率可达91%。

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	巩兆伟
	李金刚
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关键词 ：无线充电, 恒流输出, 抗偏移, 串联混合型, LCC-LCC拓扑, LC-LC拓扑

Abstract：Aiming at the problem of unstable charging current and low efficiency caused by offset of EV wireless charging coils, LCC-LC series with anti-offset constant current wireless charging structure based on parameter optimization is proposed. The mathematical model of LCC and LC compensation network is established to analyze the current output characteristics. It is found that the LCC output current is positively correlated with mutual inductance, while LC output current is negatively correlated with mutual inductance. The double-D Quadrature coil structure is adopted to solve the ipsilateral decoupling control of primary and secondary coils, thereby realizing load-independent constant current output of LCC and LC. Appropriate resonant network parameters are selected through parameter optimization, the voltage input of compensating network is complemented through series hybrid structure, and the system has anti-offset constant current output capability. Finally, a 310W experimental prototype was designed to investigate the misalignment tolerance of the system output current. The experimental results show that within the lateral offset range of 50%, the output current of the system can maintain good stability, fluctuates within 5% of the set value, and the maximum efficiency can reach 91%.

Key words： Wireless charging constant current output misalignment tolerance series hybrid structure LCC-LCC topology LC-LC topology

收稿日期: 2021-01-24

PACS:

TM724

基金资助:国家自然科学基金（12004292）和西安市科技计划（2020KJRC0035）资助项目

通讯作者: 李金刚男,1968年生,副教授,硕士生导师,研究方向为感应加热与无线电能传输技术。E-mail: 18351055@qq.com

作者简介: 巩兆伟男,1987年生,博士研究生,研究方向为无线电能传输技术。E-mail: 911737860@qq.com

引用本文:

巩兆伟, 李金刚, 同向前, 张宁超. LCC-LC串联混合型抗偏移恒流无线充电[J]. 电工技术学报, 2022, 37(6): 1513-1521. Gong Zhaowei, Li Jingang, Tong Xiangqian, Zhang Ningchao. LCC-LC Series Hybrid Wireless Charging with Misalignment Tolerance and Constant Current Output. Transactions of China Electrotechnical Society, 2022, 37(6): 1513-1521.

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