Research on Six Magnetic Poles Heteropolar Radial Permanent Magnet Biased Magnetic Bearing

Abstract

Abstract:

The configuration and working principle of an innovative six magnetic poles heteropolar radial permanent magnet biased magnetic bearing were introduced. Based on coordinate transformation method,the mathematical models of the suspension forces were deduced. A design principle of bias magnetic field based on maximization of bearing capacity in different directions was presented. The results of finite element simulation and theoretical calculations were compared to analyze the influence of the rotor position and control current. The results show that the levitation force has good linearity in the x and y directions, and the linear range in the x direction is larger. The current stiffness error between theoretical calculation and finite-element simulation is less than 3%, while the displacement stiffness error is much larger.

Key words: permanent magnet biasing, heteropolar; , inverter, coordinate transformation

摘要：

研究了一种六极异极性径向永磁偏置磁悬浮轴承，介绍了其结构及工作原理。通过坐标变换的方法将径向的悬浮力解耦，并推导了它与电流以及位移之间的函数关系。提出了根据各方向最小承载力最大来设计该磁悬浮轴承偏置磁场的原则。通过电磁场有限元软件对该磁悬浮轴承的悬浮力进行了仿真验算，仿真结果表明，在一定范围内x、y方向的悬浮力具有较好的线性特征，x方向的线性范围大于y方向的线性范围。仿真结果与计算结果的对比表明，按照等效磁路法计算出的电流刚度与仿真结果较为接近，平均误差小于3%，而位移刚度则略大于仿真结果。

关键词: 永磁偏置, 异极性, 逆变器, 坐标变换

CLC Number:

TH133.3

JI Li, XU Long-Xiang, JIN Chao-Wu. Research on Six Magnetic Poles Heteropolar Radial Permanent Magnet Biased Magnetic Bearing[J]. China Mechanical Engineering, 2013, 24(6): 730-735,741.

纪历, 徐龙祥, 金超武. 六极异极性径向永磁偏置磁悬浮轴承的研究[J]. 中国机械工程, 2013, 24(6): 730-735,741.

References

[1]Schweiter G,Bleuler H,Traxler A. Active Magnetic Bearings--Basics,Properties and Application of Ac- tive Magnetic Bearings[M]. Zurich:Vdf Hochschul- verlag, 1994.
[2]Sun J, Fang J. A Novel Structure of Permanent Magnet Biased Radial Hybrid Magnetic Bearing[J]. Journal of Magnetism and Magnetic Materials, 2011,323(2) : 202-208.
[3]Sortore C K, Allaire P E, Maslen E H,et al. Perma- nent Magnet Biased Magnetic Bearings- Design, Construction and Testing[C]//Second International Symposium on Magnetic Bearings. Tokyo, 1990: 175-182.
[4]Ehmanm C, Sielaff T, Nordmann R. Comparison of Active Magnetic Bearings with and without Perma- nent Magnet Bias[C]//Ninth International Sympo- sium on Magnetic Bearings. Lexington, 2004: 105- 110.
[5]赵旭升[1,2],邓智泉[1],王晓琳[1],梅磊[1].永磁偏置磁轴承的研究现状及其发展[J].电工技术学报,2009(9):9-20.
[6]Zhilichev Y. Analysis of a Magnetic Bearing Pair with a Permanent Magnet Excitation [J]. IEEE TransactiOns on Magnetics, 2000, 36 ( 5 ) : 3690 - 3692.
[7]曾励,汪通悦.永磁电磁轴承产生悬浮力的机理研究[J].航空学报,2000,21(3):219-221.
[8]孙津济[1],房建成[1],王曦[1],杨磊[1],王春娥[1].一种新型结构的永磁偏置径向磁轴承[J].电工技术学报,2009(11):53-60.
[9]Okada Y, Koyanayi H,Kakihara K. New Concept of Miracle Magnetic Bearings[C]//Ninth International Symposium on Magnetic Bearings. Lexington,2004: 89-95.
[10]房建成[1],孙津济[1].一种磁悬浮飞轮用新型永磁偏置径向磁轴承[J].北京航空航天大学学报,2006,32(11):1304-1307.
[11]黄峰[1],朱熀秋[1],谢志意[1],陈怀项[1],姜敞[1].径向二自由度混合磁轴承参数设计与分析[J].中国机械工程,2007,18(10):1143-1146.
[12]Reisinger M, Amrhein W, Silber S, et al. Develop- ment of a Low Cost Permanent Magnet Biased Bearing[C]//Ninth International Symposium on Magnetic Bearings. Lexington, 2004 : 113-118.
[13]唐启斌[1],赵荣祥[1],杨欢[1].逆变器供电式三极电磁轴承研究[J].机电工程,2006,23(5):5-9.
[14]梅磊.混合型磁悬浮轴承基础研究[D].南京航空航天大学;南京航空航天大学,2008: