电工技术学报2025，Vol.40Issue(14)：4369-4381,4394,14.DOI:10.19595/j.cnki.1000-6753.tces.241577
适用于水下感应式电能传输系统的抗偏移错位补偿弧形线圈设计方法
Design Method of Anti-Offset Misalignment Compensation Arc Coils for Underwater Inductive Power Transfer Systems
摘要
Abstract
Submarine currents are prone to cause multi-directional offsets in the coupling coils of the wireless charging system for AUVs,leading to a decrease in efficiency and power value,and even affecting the normal operation of the system.Recently,some offset-resistant coupling coils have been proposed to solve with these issues,but these methods have certain defects.To address these issues,this paper proposes a misalignment-compensated arc coil structure.By compensating the magnetic field,the anti-offset performance of the coil is effectively improved. Firstly,the analytical model for the spatial magnetic field of the arc coil was built based Biot-Savar law,and the analytical equation of the mutual inductance of the arc coil was obtained.Secondly,a simulation model of the arc coil was developed.An anti-offset optimization strategy for a single coil was designed based on the analysis of the spatial magnetic field of the arc coil.The influence of structural parameter changes on the spatial magnetic field distribution was also considered in the design process.Furthermore,a misalignment compensation structure for the arc coil was designed using the superposition theorem of magnetic fields,along with the spatial magnetic field distribution of the arc coil.Finally,a flowchart for the misalignment compensation arc coil was developed,taking into account the effects of the turn numbers Np1,Np2 and the misalignment distance l on mutual inductance.Through an iterative search of different values for the turn numbers and misalignment distance,the optimal parameter design was determined. Under various offsets,the calculated values of mutual inductance of the arc coil are compared with the experimental and simulated values,and the errors are less than 5％.From the simulation results,when the horizontal offset is 100 mm,the mutual inductance retention coefficient of the misalignment-compensated arc coil still reaches 0.57.In contrast,the arc coil only achieves a retention coefficient of 0.34.The arc coil also demonstrates strong offset resistance under rotating offsets.From the experimental results,the misalignment-compensated arc coil structure shows significant improvements in mutual inductance retention.When the horizontal offset is 50 mm,its retention coefficient increases by 13.29％compared to the ordinary arc coil structure.At an 80 mm horizontal offset,the retention coefficient rises by 19.23％relative to the ordinary design.The output voltage fluctuation of the load is 0.78％when the coil is horizontally offset by 30 mm,while the voltage fluctuation of the uncompensated arc coil is 7.7％under the same condition.These findings demonstrate the effectiveness of the misalignment-compensated design in maintaining mutual inductance under varying offset conditions. The following conclusions are drawn from calculations,simulations and experimental analyses:(1)The magnetic field distribution of the arc coil is mainly concentrated in the central region.The spatial magnetic field approaches zero as the distance from the center increases.(2)The proposed analytical model of mutual inductance is correct in all dimensions of the offsets.(3)The misalignment-compensated arc coil structure effectively compensates for misalignment in critical regions and demonstrates better offset resistance than other coil designs.(4)The proposed misalignment-compensated arc coil structure has lower output voltage fluctuation than the unipolar arc coil when the coils are subjected to the same offsets in a wireless power transmission system.关键词
水下感应式电能传输(IPT)系统/弧形线圈/互感计算/抗偏移Key words
Underwater inductive power transfer(IPT)system/arc coil/mutual inductance calculation/resistance to offset分类
信息技术与安全科学引用本文复制引用
白龙雷,刘一鸣,罗博,游江,历程龙..适用于水下感应式电能传输系统的抗偏移错位补偿弧形线圈设计方法[J].电工技术学报,2025,40(14):4369-4381,4394,14.基金项目
国家自然科学基金项目(52307006、52401402)和烟台市重大创新科技项目(2023ZDCX015)资助. （52307006、52401402）
