永磁偏置径向磁轴承的原理分析与参数设计  

Principle Analysis and Parameter Design of Permanent Magnet Bias Radial Magnetic Bearing

作　　者：赵旭升[1,2] 邓智泉[1] 汪波[1] 

机构地区：[1]南京航空航天大学自动化学院,南京210016 [2]南京化工职业技术学院自动控制系,南京210048

出　　处：《电工技术学报》2011年第11期127-134,共8页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金(50877036);航空基础科学基金(05F52040)资助项目

摘　　要：为克服现有永磁偏置径向磁轴承的缺陷,研究了一种磁悬浮高速电动机用永磁偏置径向磁轴承,利用等效磁路法分析其结构及工作原理,得出了径向悬浮力的数学模型,并对数学模型进行了线性化处理,得出了其径向力-位移系数和力-电流系数。给出了磁极面积、控制绕组、定转子结构等主要参数的设计方法,并制作了实验样机,对样机进行了三维有限元仿真分析和动静态悬浮实验。理论研究和实验结果表明,该型磁轴承转子磁滞损耗小,结构紧凑,控制简单,悬浮性能良好,给出的参数设计方法合理。To overcome the defects of the present permanent magnet biased radial magnetic bearing（PRMB）,a PRMB is studied to develope for the high speed magnetic suspending motor application.The configuration and fundamental principle of PRMB are analyzed.The equivalent magnetic circuit is established to deduce the mathematical model of the radial magnetic suspension force.The displacement stiffness and current stiffness are derived by linearizating the mathematical model.The parameter design of PRMB is presented including the area of magnetic pole,control windings,stator and rotor configuration etc.The parameters of the proposed prototype are given.The 3-D magnetic field simulation is performed,and the static experiment and dynamic experiment are accomplished.The theory analysis and the experiment results show that the rotor hysteresis loss of the presented PRMB is reduced,and it also has smaller volume compared to the existing structure and the control is easier.The levitation performance is well and the parameter design method is rational.

关 键 词：永磁偏置径向磁轴承 等效磁路 数学模型 参数设计 有限元仿真 实验 

分 类 号：TH133.3[机械工程—机械制造及自动化]