双边LCL无线供电系统恒流参数设计及特性研究*

doi:10.11985/2022.04.020

摘要/Abstract

摘要：

双边LCL补偿方式是无线电能传输系统的最常见的补偿方式，是当前该领域的研究热点。但随着运行条件的变化，系统参数、负载的变动，导致其恒流特性会发生改变，给实际的应用及控制带来了不少困难。从实际参数和影响特性等角度出发，对LCL补偿网络型系统恒流输出特性的影响因素进行了详细研究，建立了双边LCL补偿网络的实际电路参数模型，给出了系统恒流输出设计的负载参数约束条件，分析了损耗参数对系统的影响，提出了一种考虑元器件损耗参数的双边LCL补偿网络型无线供电系统设计方案。仿真与试验结果证明了该方案的有效性，系统输出电流波动率达到了预设的不高于10%的设计需求，同时对高次谐波具有良好的滤除效果，与理论设计一致。

关键词: 无线电能传输, LCL补偿网络, 恒流输出特性, 谐波

Abstract:

Bilateral LCL compensation method is the most common compensation method for wireless power transmission systems, and is a research hotspot in this field. However, with the change of operating conditions, the constant current characteristics vary with the system parameters and loads, which brings many difficulties to practical application and control. From the perspective of actual parameters and influence characteristics, the influencing factors of the constant current output characteristics of the LCL compensation network system are studied in detail. The actual circuit parameter model of the bilateral LCL compensation network is established, and the load parameter constraints for the constant current output design of the system are given. The influence of loss parameters on the system is analyzed as well. Considering the loss parameters of components, a design scheme of bilateral LCL compensation network wireless power supply system is proposed. The simulation and experimental results prove the effectiveness of the scheme. The system output current fluctuation rate reaches the preset design requirement of no more than 10%, and has a good filtering effect on high-order harmonics, which is consistent with the theoretical design.

Key words: Wireless power transmission system, LCL compensation network, constant current output characteristics, harmonic

中图分类号:

TM724

王玮, 鲍光婕, 孟涛, 谭林林. 双边LCL无线供电系统恒流参数设计及特性研究^*[J]. 电气工程学报, 2022, 17(4): 203-210.

WANG Wei, BAO Guangjie, MENG Tao, TAN Linlin. Constant Current Parameter Design and Characteristic Research of Bilateral LCL Wireless Power Transmission System[J]. Journal of Electrical Engineering, 2022, 17(4): 203-210.

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参数	数值
基波输入电压U_i/V	80
系统工作频率f/kHz	85
发射线圈自感L_p/μH	33.61
接收线圈自感L_s/μH	33.62
发射端补偿电感L_m/μH	33.60
接收端补偿电感L_n/μH	33.62
发射端补偿电容C_p/nF	104.34
接收端补偿电容C_s/nF	104.34
互感M/μH	4.55