基于负电阻的S-S与S-P型自治磁耦合无线电能传输特性对比研究  

Comparative Study of Autonomous Magnetically Coupled Wireless Power Transfer Characteristics between S-S and S-P Types Based on Negative Resistance

作　　者：修冠权 江彦伟 吴勇材 吴芷晗 周品 XIU Guan-quan;JIANG Yan-wei;WU Yong-cai;WU Zhi-han;ZHOU Pin(Fuzhou University,School of Electrical Engineering and Automation,Fuzhou 350108,China)

机构地区：[1]福州大学电气工程与自动化学院,福建福州350108

出　　处：《电气开关》2024年第6期18-26,共9页Electric Switchgear

基　　金：国家自然科学基金项目(62201153)。

摘　　要：基于负电阻的磁耦合无线电能传输系统是一种典型的自治系统,已被证明具有恒定的输出特性,对比研究了基于负电阻的S-S型和S-P型两种常用拓扑结构的传输特性。首先,通过耦合模方程求解基于负电阻的磁耦合无线电能传输系统工作频率和临界耦合系数;接着,结合解析和数值分析方法对比研究了两种拓扑的输出功率和传输效率,理论分析表明当耦合系数相同时,S-S型拓扑只有在负载电阻较小时才能工作在恒输出状态,而S-P型拓扑只有在负载电阻较大时才能工作在恒输出状态,最后通过电路仿真证明了理论分析的正确性,为基于负电阻的磁耦合无线电能传输系统设计提供了有益参考。The magnetically coupled wireless power transfer(WPT)system based on negative resistance is a typical autonomous system that has been proven to exhibit constant output characteristics.This paper compares and studies the transmission characteristics of two commonly used topological structures,namely the S-S type and S-P type,based on negative resistance.Firstly,the working frequency and critical coupling coefficient of the magnetically coupled WPT system based on negative resistance are solved using the coupling model equation.Then,a comparative study of the output power and transmission efficiency of the two topologies is conducted using analytical and numerical analysis methods.Theoretical analysis indicates that,when the coupling coefficient is the same,the S-S type topology based on negative resistance can only operate in a constant output state when the load resistance is small,while the S-P type topology can only operate in a constant output state when the load resistance is large.Finally,circuit simulation is performed to validate the theoretical analysis,providing valuable reference for the design of magnetically coupled WPT systems based on negative resistance.

关 键 词：负电阻 磁耦合 临界耦合系数 传输功率 传输效率 

分 类 号：TM46[电气工程—电器]