圆盘式磁流变制动器磁饱和有限元分析  

Finite Element Analysis of Magnetic Saturation of Disk-type Magnetorheological Brake

作　　者：乔臻[1] 黄金[1] 

机构地区：[1]重庆理工大学机械工程学院,重庆400054

出　　处：《机械传动》2016年第5期139-144,共6页Journal of Mechanical Transmission

基　　金：国家自然科学基金(51175532);国家自然科学基金(11272368);重庆市教委科学技术研究项目(KJ1400934);重庆理工大学科研启动基金(2015ZD03)

摘　　要：针对磁流变器件的磁饱和程度不明,提出了一种评估磁饱和率。对圆盘式磁流变制动器进行磁场有限元分析,并用磁饱和评估函数进行评估。结果表明,输入电流为2 A时,制动器刚好达到磁饱和。根据磁饱和分析进行结构优化,用磁饱和评估函数和评估磁饱和率对优化前后的制动器进行分析。结果表明,优化后的制动器,制动力矩增大了57%,磁饱和程度降低了0.92%。进一步地,在等磁动势情况下,对三类磁流变制动器进行磁场有限元分析。结果表明,异向绕组侧壁型抗磁饱和能力最强,外沿型抗磁饱和最弱;外沿型工作间隙磁感应强度分布较为均匀,而侧壁型工作间隙磁感应强度分布极为不均匀;对于侧壁型制动器,同向绕组工作间隙磁感应强度比异向绕组较为均匀。An evaluation magnetic saturation rate is proposed due to magnetic saturation degree not clear in the magnetorheological device. The magnetic field finite element analysis of disc- type magnetorheological brake is carried out,and the simulation results are analyzed by magnetic saturation evaluation function. The results indicate that,the brake just happens to be magnetic saturation during the input current is 2 A. The structure of brake is optimized by magnetic saturation analysis and brake in before and after the optimization is analyzed by magnetic saturation evaluation function and magnetic saturation evaluation rate,the results indicate that,brake torque increased by 57%,the evaluation of magnetic saturation rate decreased by 0. 95%. Furthermore,the magnetic fields in the three types of magnetorheological brake are analyzed by using finite element in the case of equal of magneto motive force,the results indicate that,the side- wall- type brake and the excitation coil is the opposite winding of the resistance magnetic saturation capacity is the strongest,the outer- type brake of resistance magnetic saturation capacity is the weakest. The outer- type brake of working gap magnetic induction intensity distribution is more uniform,while the side- wall- type brake of working gap magnetic induction intensity distribution is uneven extremely. The working gap magnetic induction intensity distribution of the same- direction- winding is relatively even than the opposite- direction- winding in the side- wall- type brake.

关 键 词：磁流变制动器 有限元分析 磁饱和 

分 类 号：TB381[一般工业技术—材料科学与工程] TH134[机械工程—机械制造及自动化]