磁悬浮轴承非线性支承特性的研究  

Study on Nonlinear Bearing Characteristics of Magnetic Bearing

作　　者：田聪 王念先[1,2] 王东雄 徐波 TIAN Cong;WANG Nian-xian;WANG Dong-xiong;XU Bo(The Key Laboratory for Metallurgical Equipment and Control of Ministry of Education,Wuhan University of Science and Technology,Hubei Wuhan 430081,China;Hubei Key Laboratory of Mechanical Transmission and Manufacturing Engineering,Wuhan University of Science and Technology,Hubei Wuhan 430081,China;Dongfeng Off-Road Vehicle Co.,LTD.,Hubei Wuhan 430058,China)

机构地区：[1]武汉科技大学冶金装备及其控制教育部重点实验室,湖北武汉430081 [2]武汉科技大学湖北省机械传动与制造工程重点实验室,湖北武汉430081 [3]东风越野车有限公司,湖北武汉430058

出　　处：《机械设计与制造》2023年第1期45-49,共5页Machinery Design & Manufacture

基　　金：国家自然科学基金项目(51975427);湖北省自然科学基金项目(2019CFB460);中国国家留学基金委(201808420108)。

摘　　要：目前磁悬浮轴承支承特性的研究主要是基于线性支承力模型或者忽略非线性因素(漏磁及磁饱和)的非线性支承力模型,然而这样的研究方法不能全面地反应磁悬浮轴承的支承特性。因此需要对考虑了非线性因素的支承特性进行研究。首先,建立考虑漏磁及磁饱和的非线性支承力模型,接着利用simulink对磁悬浮轴承系统进行动态仿真,最后对磁悬浮轴承的非线性支承特性进行了分析。研究表明,控制电流越大,系统的漏磁及磁饱和现象越严重,非线性系统提供的支承刚度更小、抵御干扰的能力更差;转子偏离轴承中心越远,非线性因素对支承特性的影响越大。考虑了非线性影响因素的磁悬浮轴承系统对实际工作状况更具有指导意义,可为磁悬浮轴承在非线性下的实际研究提供基础。At present,the research on bearing characteristics of magnetic bearing is mainly based on linear bearing capacity model or nonlinear bearing capacity model which ignores nonlinear factor(flux leakage and magnetic saturation),however,such a research method cannot fully reflect the bearing characteristics of magnetic bearings.Therefore,it is necessary to study the bearing characteristics with nonlinear factors taken into account.Firstly,the nonlinear bearing capacity model considering flux leakage and magnetic saturation is established,and then simulink is used to simulate the magnetic bearing system dynamically,finally,the nonlinear bearing characteristics of magnetic bearing are analyzed.The results show that the larger the control current,the more serious the flux leakage and magnetic saturation,the smaller the bearing stiffness provided by the nonlinear system,and the poorer the ability to resist interference.The further the rotor deviates from the center of the bearing,the greater the influence of the nonlinear factors on the bearing characteristics.The magnetic bearing system considering the nonlinear influence factors has more guiding significance to the actual working condition,which can provide the foundation for the actual research of magnetic bearing under the nonlinear condition.

关 键 词：磁悬浮轴承 漏磁 磁饱和 动态仿真 支承刚度 

分 类 号：TH16[机械工程—机械制造及自动化] TH133