基于替代模型的旋转磁耦合器磁心结构优化  

Optimization of the Core Structure for the Rotary Magnetic Coupler Based on Surrogate Model

作　　者：丰宇宸 孙跃[1] 邓德强 胡宏晟 胡韩 Feng Yuchen;Sun Yue;Deng Deqiang;Hu Hongsheng;Hu Han(School of Automation Chongqing University,Chongqing 400044 China)

机构地区：[1]重庆大学自动化学院,重庆400044

出　　处：《电工技术学报》2025年第4期997-1008,共12页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金面上资助项目(62073047)。

摘　　要：旋转磁耦合器作为一种适用于各类旋转应用场景的无线电能传输系统电磁耦合机构,与传统接触式集电环相比,具有使用寿命长、无磨损、安全可靠等优点。其中,磁心的结构设计与旋转磁耦合器的性能、成本和可靠性息息相关。针对旋转磁耦合器的磁心结构优化问题,该文提出了一种基于替代模型的磁心结构优化方法,该方法能够在确保耦合系数稳定的同时减少磁心的使用量。首先确定了旋转磁耦合器的结构参数,并采用拉丁超立方抽样方法对不同结构参数进行随机抽样,并根据结果创建了数据集。在此数据集的基础上,利用极端随机森林算法构建了替代模型,用于预测不同磁心结构下的系统耦合系数,并通过测试数据集验证了该替代模型的预测精度。最后,结合替代模型和多目标粒子群优化算法,给出了旋转磁耦合器的磁心结构优化方法,通过该方法可以得到在考虑磁心使用量和保证耦合系数稳定前提下的最优磁心结构设计方案。搭建了实验样机以验证该优化方法的正确性和可行性,系统的传输功率为3.2 kW,传输效率为97%,磁心用量得到大幅下降。During the design process of rotary magnetic couplers,many magnetic cores are typically employed to achieve magnetic constraint,enhance coupling performance,and reduce magnetic leakage.However,decreasing the cost,self-weight,and volume of rotary magnetic couplers is challenging,and power density needs to be improved.In some special applications,it may also affect the reliability of the equipment.Current research mainly relies on engineering experience and trial-and-error methods for magnetic core structure design,causing issues such as imprecise parameter design and extensive simulation workload.This paper proposes a magnetically optimized method based on surrogate modeling to meet the lightweight design requirements of magnetic core structures for rotary couplers.This method can reduce the usage of magnetic cores while ensuring stable transmission performance.The structural parameters of the rotary magnetic coupler are first determined,a Latin hypercube sampling method is employed to sample different structural parameters randomly,and a dataset is constructed.A surrogate model is constructed using the extreme random forest algorithm to predict system coupling coefficients for different magnetic core structures.The predictive accuracy of the surrogate model is validated using a test dataset.Finally,combining the surrogate model with a multi-objective particle swarm optimization method,an optimization approach for the magnetic core structure of the rotary magnetic coupler is presented.This approach provides optimal magnetic core design solutions considering the usage of the magnetic core.Simulation results indicate that the maximum error between the simulated coupling coefficient and the output results of the surrogate model is 0.00138,with a maximum relative error of 0.161%and an average relative error of 0.096%.The parameter set based on this surrogate model decreases magnetic core volume by 32.15%.The volume of the magnetic core significantly decreases when the coupling coefficient is allowed to fluctuate durin

关 键 词：无线电能传输 旋转磁耦合器 磁心结构优化 极端随机森林 多目标粒子群优化 

分 类 号：TM724[电气工程—电力系统及自动化]