基于辅助拾取模块的感应耦合能量传输系统电流谐波抑制方法  

A Current Harmonic Suppression Method for Inductively Coupled Power Transfer System Based on Auxiliary Pickup Module

作　　者：杨继鑫 史黎明[1,2] 殷正刚 范满义[1] 李耀华 Yang Jixin;Shi Liming;Yin Zhenggang;Fan Manyi;Li Yaohua(Key Laboratory of Power Electronics and Electric Drive Institute of Electrical Engineering Chinese Academy of Sciences,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院电工研究所中国科学院电力电子与电力驱动重点实验室,北京100190 [2]中国科学院大学,北京100049

出　　处：《电工技术学报》2024年第24期7663-7673,共11页Transactions of China Electrotechnical Society

基　　金：国家重点研发计划项目(2016YFB1200601-B21);国家自然科学基金项目(52372367)资助。

摘　　要：为抑制感应耦合能量传输(ICPT)系统中高频逆变器的输出电流谐波,提出一种基于辅助拾取模块的电流谐波抑制方法。首先,建立ICPT系统的数学模型,分析了电流谐波的产生机理和影响因素。其次,以抑制3次电流谐波为例,详细分析了辅助拾取模块抑制电流谐波的原理,通过合理设计辅助拾取模块的品质因数,可防止拾取线圈之间的交叉干扰。最后,通过仿真和实验验证了提出方法的有效性。仿真与实验结果表明,提出的方法可有效降低3次电流谐波幅值,减小电流总谐波畸变率(THD),并且轻载工况下系统效率可得到进一步提高。Due to convenience,safety,and aesthetics,inductively coupled power transfer(ICPT)systems have been applied in various applications.However,the output current harmonics of the high-frequency inverter in the ICPT system can cause the switch’s operation and circuit control problems,increasing the additional core loss in coils.Therefore,it is important to suppress the current harmonics.As an example,the 3rd current harmonic is analyzed in detail.Firstly,the mathematical model of the ICPT system is established based on the S-S compensation circuit.The mechanism of current harmonics generation and the factors affecting the amplitude of current harmonics are analyzed.Due to the square wave output voltage and the existence of dead time,the output current contains a large number of harmonics.A significant distortion of the output current of the high-frequency inverter will be caused under light load conditions.Then,a current harmonic suppression method for ICPT system based on auxiliary pickup module is proposed to suppress the output current harmonics of the high-frequency inverter.The natural resonant frequency of the auxiliary pickup module is set to three times the fundamental frequency,and the feasibility of suppressing the 3rd current harmonic is demonstrated through theoretical analysis.Furthermore,the quality factor of the auxiliary pickup module is designed to avoid cross interference between pickup coils,thereby not affecting the power transmission of the ICPT system.Finally,simulation and experimental results verify the theoretical analysis and the proposed method.The amplitude of the 3rd current harmonic and the total harmonic distortion(THD)are reduced.Compared with the traditional ICPT system,the system efficiency is improved effectively under light load conditions.The following conclusions can be drawn.(1)When the quality factor Qp of the primary side decreases or the quality factor Qs1 increases,the amplitude of the 3rd current harmonic increases,leading to an increase in the THD of the output current.Co

关 键 词：感应耦合能量传输 辅助拾取模块 电流谐波抑制 品质因数 

分 类 号：TM614[电气工程—电力系统及自动化]