内外轴式磁性联轴器的优化设计

Optimal design of radial magnetic couplings

对磁性联轴器的国内外研究现状做了评述,建立了实用的优化设计评判指标和数学模型。改进了等效磁荷法,从求解效率和求解精度两方面将其与改进前的等效磁荷法、片电流方法和三维有限元法进行了比较。将正交实验法引入优化过程中,提出了一种实用的磁性联轴器优化设计方案。求解结果表明:等效磁荷法的求解时间和精度较不稳定,改进的等效磁荷法的求解精度比原方法提高了约5%,求解效率提高了约55%。片电流法求解效率极高,但精度较低。三维有限元的求解精度较稳定,误差约为5%,但求解效率较低,求解每组模型需花费约9 min的时间。通过正交实验法,仅需使用9组分析模型即可获得适合的初始参数值,结合标准的最优值搜索技术可方便获得多组最优参数设计值。该方案可满足磁性联轴器优化设计的稳定可靠、精度高、方便实用等要求。

The state-of-art of the related research for radial magnetic couplings was reviewed. A practical mathematical model and a novel criterion were set up. And then, improved Equivalent Magnetic Charge （EMC） method was compared with original one, Current Sheet Model （CSM） methQd and 3D FEA method in efficiency and accuracy. Finally, Design of Experiments （DOE） was introduced and an effective and practical optimizing process was proposed. The results show that the accuracy of improved EMC is increased by about 50//00 and the efficiency is increased by about 55% compared as that of the original EMC method. The error of the CSM method is big, though the efficiency of CSM is much higher. For the 3D FEA method, the circumstance is contrary. The proper initial values can be obtained only by using nine simulation models with the DOE method, and multiple sets of optimizing cases were obtained easily through standard optimization methods. The results show that proposed optimizing method can satisfy the requirements of practicability, higher precision as well as strong sta bilization.