双U形磁芯结构的非接触变压器磁路设计及仿真  

Magnetic Circuit Design and Simulation of Non-contact Transformer withDual U-shaped Magnetic Core Structure

作　　者：刘赛南 Liu Sainan(School of Electrical Engineering,Henan Polytechnic University,Jiaozuo,Henan 454000,China)

机构地区：[1]河南理工大学电气工程学院,河南焦作454000

出　　处：《机电工程技术》2025年第3期148-153,共6页Mechanical & Electrical Engineering Technology

摘　　要：基于电磁感应原理研究了无线供电系统耦合器的磁路,为提高传输效率并易于加工生产,针对非接触变压器,提出一种双U形磁芯结构。完成了双U形结构非接触变压器的结构参数设计,建立了感应供电耦合器的有限元模型,对该非接触变压器的磁场特性进行仿真分析得出:双U形磁芯结构非接触变压器只有磁芯齿部的磁密最高。为了改善气隙漏磁大的情况,对比分析了不同气隙间距、不同磁芯间距、不同系统频率对输出电压的影响,根据仿真结果得出:频率在0~30 kHz范围内变化,输出电压随频率的增大而增大,但频率当频率达到10 kHz以上时,系统输出电压随着频率的增大而缓慢增加;气隙间距由1 mm增大到6 mm,输出电压由650 V降低至616 V;磁芯间距由15 mm增加至30 mm时,输出电压保持不变。这种双U形磁芯结构的非接触变压器可减小气隙间距来提高输出性能,而较宽的频率选择范围,降低了设计难度,且磁芯间距对输出性能无影响,降低了加工难度,研究成果可为工业化批量生产提供理论基础。Magnetic circuit of wireless power supply system couplers is studied based on the principle of electromagnetic induction.In order to improve transmission efficiency and facilitate processing and production,a double U-shaped magnetic core structure is proposed for noncontact transformers.The structural parameter design of the non-contact transformer is completed with a double U-shaped structure,a finite element model of the induction power supply coupler is established,and the magnetic field characteristics of the non-contact transformer are simulated and analyzed.It is found that the magnetic density of the non-contact transformer with a double U-shaped magnetic core structure is highest only at the teeth of the magnetic core.To improve the problem of large air gap magnetic leakage,a comparative analysis is conducted on the effects of different air gap spacing,different magnetic core spacing,and different system frequencies on the output voltage.Simulation results show that when the frequency varies within the range of 0~30 kHz,the output voltage increases with the increase of frequency.However,when the frequency reaches 10 kHz or above,the system output voltage increases slowly with the increase of frequency;The air gap spacing increased from 1 mm to 6 mm,and the output voltage decreased from 650 V to 616 V;When the distance between magnetic cores increases from 15 mm to 30 mm,the output voltage remains unchanged.This non-contact transformer with a dual U-shaped magnetic core structure can reduce the air gap spacing to improve output performance,while the wider frequency selection range reduces design difficulty.Moreover,the magnetic core spacing has no effect on output performance,reducing processing difficulty.The research result provides a theoretical basis for industrial mass production.

关 键 词：无线供电 非接触变压器 U形磁芯 气隙间距 有限元仿真 

分 类 号：TM4[电气工程—电器] TM724