基于电磁多次耦合的盘式磁力耦合器转矩分析  

Torque Analysis of Asynchronous Magnetic Coupler Based on Multiple Electromagnetic Coupling

作　　者：杨超君[1] 王剑 杭天 戚玉堂 汪奥 YANG Chaojun;WANG Jian;HANG Tian;QI Yutang;WANG Ao(School of Mechanical Engineering,Jiangsu University,Zhenjiang Jiangsu 212013,China)

机构地区：[1]江苏大学机械工程学院,江苏镇江212013

出　　处：《机械设计与研究》2024年第4期146-152,共7页Machine Design And Research

基　　金：国家自然科学基金资助项目(51875254)。

摘　　要：针对提高盘式磁力耦合器电磁转矩计算精度的问题,引入了多次电磁耦合的等效磁路法,运用安培定律考虑感应电流产生的感应磁场对原磁场的影响,电磁耦合后的磁场产生新的感应电流,新的感应电流又会影响气隙磁场,以此不断循环进行电磁多次耦合直至耦合后的气隙磁通达到精度要求,考虑到三维端部效应,引入Russell-Norsworthy系数对电磁转矩进行修正,最后得到电磁转矩表达式,并将未耦合和多次耦合后电磁转矩的值进行对比;然后通过有限元模拟软件得到磁力耦合器的电磁转矩和机械特性曲线;最后,搭建传动试验平台对电磁转矩进行测量,所得试验结果与理论计算结果、仿真结果较为一致,表明所提出的电磁转矩分析模型的正确性,为进一步研究实心盘式磁力耦合器的传动特性提供参考。Toimprove the calculation accuracy of the electromagnetic torque of eddy-current magnetic couplers with 9 pairs of permanent magnets,the magnetic equivalent circuit(MEC)method based on multiple electromagnetic coupling is established.The Ampere's loop law is applied to analyze the influence of the eddy current reaction magnetic flux on the initial magnetic flux and the influence of the coupled magnetic flux on the eddy current.The multiple electromagnetic coupling is carried out until the accuracy requirements are met and the expressions of the electromagnetic torque are obtained.3D effects are also taken into account to adjust the model.The uncoupled value of the electromagnetic torqueis compared with the value after multiple coupling.Then the electromagnetic torque and mechanical characteristic curves of the magnetic coupler are obtained by finite element simulation.Lastly,the magnetic drive experimental platform is built to measure the electromagnetic torque.The experimental results are in good agreement with the results of theoretical calculation and the simulation analysis,which shows that the formula of torque has high accuracy and can be used as a reference for further research on the transmission characteristics of eddy-current magnetic couplers.

关 键 词：盘式磁力耦合器 电磁转矩 电磁多次耦合 等效磁路法 感应磁通 

分 类 号：TH133.4[机械工程—机械制造及自动化]