起重机小车运行机构永磁涡流制动特性仿真分析

发布时间：2019-03-14 09:14

【摘要】：基于电磁学理论分析了永磁涡流制动基本原理,建立了制动力关于永磁体充磁厚度和底面直径、磁极对数、极距以及空气间隙厚度等参数的数学模型;对比分析了解析计算与Ansoft Maxwell软件仿真结果,验证了数学模型的准确性和实用性;探究了磁极对数、永磁体永磁厚度和底面直径、空气间隙厚度以及极距对制动力的影响机理,得到了制动力与以上各参数之间的特征关系,并根据桥式起重机结构特点建立了小车运行机构的动力学模型。基于Matlab/Simulink软件对某型号桥式起重机小车运行机构的永磁涡流制动特性和吊重摆角进行了仿真分析,为起重机小车运行机构永磁涡流制动的设计提供了依据。
[Abstract]:Based on the electromagnetic theory, the basic principle of permanent magnet eddy current braking is analyzed, and the mathematical model of braking force about the parameters of permanent magnet, such as magnetic thickness, bottom diameter, logarithm of magnetic pole, polar distance and thickness of air gap, is established. The accuracy and practicability of the mathematical model are verified by comparison and analysis of the analytical calculation and the simulation results of Ansoft Maxwell software. The influence mechanism of magnetic pole logarithm, permanent magnet thickness and base diameter, air gap thickness and pole distance on braking force is investigated, and the characteristic relationship between braking force and above parameters is obtained. According to the structural characteristics of overhead crane, the dynamic model of the trolley running mechanism is established. Based on Matlab/Simulink software, the permanent magnet eddy current braking characteristics and lifting swing angle of a crane trolley running mechanism are simulated and analyzed, which provides a basis for the design of permanent magnet eddy current braking mechanism of crane trolley running mechanism.
【作者单位】： 西南交通大学机械工程学院;
【基金】：国家自然科学基金项目(51175442) 四川省国际合作计划项目(2016HH0032)
【分类号】：TH21

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