永磁涡流耦合器传递转矩计算方法研究  

Research on Transmitted Torque Calculation Method of Permanent Magnet Eddy-Current Couplers

作　　者：程习康 刘巍[1] 孙明浩 罗唯奇 CHENG Xi-kang;LIU Wei;SUN Ming-hao;LUO Wei-qi(School of Mechanical Engineering,Dalian University of Technology,Dalian 116024,China.)

机构地区：[1]大连理工大学机械工程学院,辽宁大连116024

出　　处：《东北大学学报（自然科学版）》2021年第12期1739-1746,共8页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(U1808217,51905077);辽宁省“兴辽英才”计划项目(XLYC1807086,XLYC1801008);大连市高层次人才创新支持计划项目(2017RJ04,2019CT01).

摘　　要：永磁涡流耦合器作为一种传动装置,传递转矩的有效计算是评价其传动性能的重要指标.针对一台6磁极对数、额定输入转速1450 r/min的永磁涡流耦合器,首先,根据耦合器几何结构,采用有限元方法对磁力线走向进行了仿真分析,获得永磁涡流耦合器的磁路分布,进而通过分析漏磁边界条件得到了泄漏磁阻和有效磁动势;其次,建立导体盘涡流的坐标系,根据趋肤深度和安培环路定律,考虑磁场分布的连续性和对称性,构建了耦合器的磁感应强度方程;然后,根据导体盘涡电流密度和电导率的数学关系,同时考虑三维端部效应,得到了传递转矩的解析结果;最后,建立样机试验平台和三维有限元模型对该方法进行验证.结果表明,在一定的转速差范围内,所提计算方法具有较好的精度,相对误差在6%以内.采用该方法对永磁涡流耦合器的设计优化提出了一些合理化建议.As a kind of driving device,the effective calculation of transmitted torque for permanent magnet eddy-current couplers is a significant index to evaluate the transmission performance.For a permanent magnet eddy current coupler with 6 pole pairs and 1450 r/min rated input speed,firstly,according to the geometry,finite element method is used to simulate the magnetic field lines and to obtain the magnetic path distribution.Also,through the analysis of leakage fluxes boundary condition,the leakage magnetic resistance and effective magneto motive force are obtained.Secondly,the coordinate system of eddy current on the conductor disk is established.According to the law of skin depth and ampere loop,the magnetic induction intensity equation is constructed which considers the continuity and symmetry of magnetic field distribution.Then,based on the mathematical relationship between eddy-current density and conductivity of the conductor disk,the analytical result of transmitted torque is presented accounting for the three-dimensional end effect.Finally,a prototype test platform and a three-dimensional finite element analytical model are built to verify the method.The results show that the proposed method has good accuracy within the range of speed slip in a certain operation where the relative error is within 6%.Moreover,some reasonable suggestions are put forward for the design optimization of permanent magnet eddy-current couplers.

关 键 词：永磁涡流耦合器 磁路 泄漏磁阻 传递转矩 试验 

分 类 号：TH133.4[机械工程—机械制造及自动化]