谐振开关电容变换器磁集成电感设计  

Design of Magnetic Integrated Inductor for Resonant Switched Capacitor Converter

作　　者：李紫薇 吴学智[1] 王静 祁静静 荆龙[1] 续文政[1] Li Ziwei;Wu Xuezhi;Wang Jing;Qi Jingjing;Jing Long;Xu Wenzheng(National Active Distribution Network Technology Research Center Beijing Jiaotong University,Beijing 100044 China;Shenzhen Power Supply Co.Ltd,Shenzhen 518001 China)

机构地区：[1]北京交通大学国家能源主动配电网技术研发中心,北京100044 [2]深圳供电局有限公司,深圳518001

出　　处：《电工技术学报》2022年第24期6230-6238,共9页Transactions of China Electrotechnical Society

基　　金：面向大规模可再生能源消纳的城市建筑与电网互动关键技术研究与应用资助项目(090000KK52210134)。

摘　　要：谐振开关电容变换器(SCC)因可实现零电流开关、减小开关损耗和提高功率密度而广泛应用于数据中心、电动汽车等高功率密度和增益比场合,电感元件作为其重要组成部分是影响变换器提高性能的关键因素。为解决变换器前后级谐振电流不等而导致的解耦困难问题,该文设计一种中柱不开气隙的解耦磁集成电感。在研究电路工作原理的基础上,通过对偶分析法分析并与耦合磁集成相比得出,中柱不开气隙的解耦磁集成方法电感耦合度更高、且能够实现两级解耦。变换器谐振参数不对称会导致前后级谐振周期不一致,该文采用完全对称绕组以降低绕组对磁性参数的影响,保证多个电感参数的一致性。最后制作实验样机,验证了所设计的谐振SCC磁集成电感的合理性和有效性。Since resonant switched capacitor converter can realize zero-current switching,reduce switching loss,and improve power density,it is widely used in high power density and gain ratio applications such as data centers and electric vehicles.As an essential part of SCC,the inductor is a crucial factor affecting the improvement of converter performance.To solve the decoupling problem of unequal resonance currents of the front and second stages of the converter,this paper designs the decoupled magnetic integrated inductor without opening the air gap in the center column.Based on the analysis of the working principle of the circuit,compared with the coupled magnetic integration,the decoupled magnetic integration method without an air gap in the center column has a higher inductance coupling degree and can achieve two-stage decoupling.The asymmetry of the resonant parameters of the converter will lead to inconsistent resonant periods of the front and second stages.In this paper,the complete symmetrical winding is used to reduce the influence of the windings on the magnetic parameters,which can effectively ensure the consistency of multiple inductor parameters.Finally,the experimental prototype is built to verify the rationality and effectiveness of the designed resonant SCC magnetic integrated inductor.

关 键 词：耦合电感 解耦磁集成 完全对称绕组 谐振开关电容变换器 

分 类 号：TM46[电气工程—电器]