径向磁轴承磁路耦合对磁力的影响及其解耦控制策略  

Impacts of Magnetic Flux Coupling on Force Arrangements of Radial Magnetic Bearings and Its Decoupling Control Strategies

作　　者：景轩 谭援强[2] 朱杰 

机构地区：[1]湘潭大学机械工程学院,湘潭411105 [2]华侨大学制造工程研究院,厦门361021 [3]湖南崇德工业科技有限公司,湘潭411133

出　　处：《中国机械工程》2017年第14期1669-1676,共8页China Mechanical Engineering

基　　金：湖南省战略性新兴产业科技攻关专项(2015GK1032)

摘　　要：由于磁路在磁轴承定子磁极间的耦合,磁力的分布会发生变化,致使理论模型推导的控制电流难以提供准确的回复力。基于Boit-Savart定理建立了磁场分布模型并分析了磁路耦合的影响因素;建立了考虑磁路耦合的磁力等效模型;分析了磁路耦合对磁力误差的影响,并提出了解耦控制策略;进行了电磁场仿真,验证了解耦控制的正确性;通过磁轴承稳态悬浮实验,验证了解耦控制策略的有效性。Because of the magnetic flux coupling among the magnetic stator poles,the distribution of the magnetic force would suffer a great inaccuracy,which would result in the disability of the original control currents to provide an accurate restoring forces.In order to eliminate the magnetic coupling impacts,based on the Boit-Savart law,a magnetic flux distribution model was built to discuss what kind of factors would influence the magnetic field coupling.A magnetic force equivalent model with consideration of the gap variations was established.The flux coupling degree impacts on the magnetic force errors of an 8-pole magnetic bearing were analyzed.A decoupling control strategy was proposed,and its validity was tested by the ANSYS simulation and the steady state suspension test of magnetic bearings.

关 键 词：磁力轴承 磁耦合 解耦控制 有限元分析 

分 类 号：TP211.4[自动化与计算机技术—检测技术与自动化装置]