摘要
为解决电磁直驱变速器(DAMT)铁磁材料磁化所造成的控制精度下降问题,以升挡过程为例,利用JMAG电磁场软件分析因铁磁材料磁化所造成的磁路变化及对执行器输出力的影响。建立接合套磁化后受磁场力作用的数学模型,分析接合套升挡过程中的受力情况及对换挡力的影响,分析齿轮啮合部位磁化程度及所受径向吸力情况。基于上述影响机理,利用“堵磁”原理进行隔磁设计,分析不同隔磁方案下的隔磁效果,以最大程度提高控制精度为目标,确立隔磁衬套加7075铝合金接合套隔磁方案。结果表明:采取隔磁措施后,磁路变化对执行器输出力的影响值和接合套所受磁场力明显减小,齿轮磁化所造成的径向吸力问题得到较大改善。分析铁磁材料磁化影响并进行隔磁设计对提高DAMT稳定性及控制精度具有重要意义。
In order to solve the problem of the reduced control precision caused by the magnetization of ferromagnetic materials of direct-drive automated mechanical transmission,taking the upshift process as an example,the change of magnetic circuit and influence caused by the magnetization of ferromagnetic materials in case of the upshift process was analyzed by JMAG.The mathematical model of the magnetic field force of the joint sleeve after magnetization was established.The force condition of the joint sleeve and influence on shifting force during the upshift were analyzed.The magnetization degree and radial suction of the gear meshing part were calculated.Based on the above-mentioned influence mechanism,the magnetic isolation design is carried out using the"magnetic blocking"principle.The magnetic isolation effect under different magnetic isolation schemes was analyzed,with the goal of maximizing control accuracy,and a magnetic isolation scheme with 7075 aluminum alloy joint sleeve was established.The conclusion shows that after the magnetic isolation measures were taken,the influence of the magnetic circuit changes on the output force of the actuator and the magnetic field force on the joint sleeve are significantly reduced.The radial suction problem caused by the magnetization of the gear is greatly ameliorated.It is of great significance to analyze the influence of magnetization of ferromagnetic materials and design magnetic isolation to improve the stability and control accuracy of DAMT.
作者
汪学杞
李波
葛文庆
谭草
李孝磊
王俊源
WANG Xueqi;LI Bo;GE Wenqing;TAN Cao;LI Xiaolei;WANG Junyuan(School of Transportation and Vehicle Engineering,Shandong University of Technology,Zibo 255049,China)
出处
《山东理工大学学报（自然科学版）》
CAS
2021年第2期1-7,共7页
Journal of Shandong University of Technology:Natural Science Edition
基金
国家自然科学基金项目(51975341,51875326)
山东省重点研发计划项目(2019GGX104018)。
关键词
电磁直驱变速器
换挡力
磁场力
隔磁
direct-drive automated mechanical transmission
shift force
magnetic field force
isolation of magnetic field
