三相旋转磁场高效耦合自取能研究  

Research on the high-efficient coupling energy self-harvesting from Three-phase rotating magnetic field

作　　者：颜沛武 刘子超 张文斌[1] 黄汝金 谭清华 Yan Peiwu;Liu Zichao;Zhang Wenbin;Huang Rujin;Tan Qinghua(College of Mechanical and Electrical,Kunming University of Science and Technology,Kunming 650500,China;Kunming Pinqi Technology Co.,Ltd.,College of Electric Power,Kunming University of Science and Technology,Kunming 650211,China;College of Science,Kunming University of Science and Technology,Kunming 650500,China)

机构地区：[1]昆明理工大学机电工程学院,昆明650500 [2]昆明品启科技有限公司,昆明650211 [3]昆明理工大学理学院,昆明650500

出　　处：《仪器仪表学报》2024年第6期288-296,共9页Chinese Journal of Scientific Instrument

基　　金：促进绿色能源发展的新型智能传感技术研发(202104BN050011)项目资助。

摘　　要：目前三芯电缆自取能效率低已经成为限制电缆沿线在线监测技术发展的关键,为此提出了一种用于三芯电缆的全新磁场自取能方案。与基于互感器原理的传统取能方案不同,创新性地提出了一种基于电机原理的磁场取能方案,此方案提升了磁芯与三相电流产生的旋转磁场的耦合程度,将线圈正法线与电缆表面切向平行改为与径向平行,并给出了最佳取能位置。仿真结果表明,该方案相比以往方案可获得更高的线圈开路电压和输出功率,在磁场自取能效率上有显著提升。结合有限元仿真与神经网络算法,进一步分析一次侧电流、磁芯材料和磁芯尺寸等参数对线圈开路电压的影响,并给出具体的优化设计方案。最后制作样机,在实验室条件下开展相关实验,根据实验结果,一次侧电流50 A,三组线圈共2100匝时最大输出功率为2.243 mW。Currently,the low self-harvesting efficiency of three-core cables has become a critical limitation for the application of online monitoring technology along cable routes.To address this issue,this paper proposes a novel magnetic field self-harvesting solution for three-core cables.Unlike traditional energy harvesting approaches based on the principle of transformers,this study innovatively proposes a magnetic field harvesting approach based on motor principles.This approach enhances the coupling between the core and the rotating magnetic field generated by the three-phase current,modifying the normal orientation of coil from tangentially parallel to the cable surface magnetic field to radially parallel,and identifies the optimal energy harvesting position of device.The simulation results demonstrate that the approach proposed in this study yields higher open-circuit voltage and output power of coil compared to previous reported methods,thereby providing a significant enhancement of magnetic field self-harvesting efficiency.By combining finite element simulations with neural network algorithms,further analysis is conducted to assess the impact of parameters such as primary-current,material and dimensions of magnetic core on the open-circuit voltage of coils.Accordingly the optimization design strategies are proposed.Finally,a prototype is constructed and experiments are conducted in a laboratory setting.It′s found that the maximum output power is 2.243 mW when the primary-side current is 50 A and three sets of coils possess 2100 turns.

关 键 词：三芯电缆 旋转磁场 自取能 磁芯设计 

分 类 号：TH707[机械工程—仪器科学与技术]