同极结构的径向磁力轴承研究

发布时间：2018-04-01 21:39

本文选题：同极结构　切入点：径向磁力轴承　出处：《武汉理工大学》2012年硕士论文

【摘要】：主动径向磁力轴承主要有异极结构和同极结构两种,传统异极结构的径向磁力轴承的磁力线是垂直于转子轴线的,而同极结构的径向磁力轴承的磁力线是平行于转子轴线的。传统结构轴承定子与电机相似,制造容易,而同极结构比较显著的优点就是磁极之间的耦合较小,易于控制,但这种结构形式加工困难,制造精度不高,因此目前普遍采用的是传统异极结构的径向磁力轴承。然而,同极结构的径向磁力轴承相比于传统结构还有一些其他优点,在某些特殊场合比异极结构更加适用,因此对于同极结构的径向磁力轴承的研究是很有必要的。本文的主要研究对象为同极结构的径向磁力轴承,主要研究方法是以传统结构的径向磁力轴承为参照,主要从结构设计、向心效应和能量损耗三个方面对同极结构的径向磁力轴承作了初步研究。首先,以电磁场基本理论为基础,结合传统结构径向磁力轴承的结构设计方法,分析总结了一种同极结构径向磁力轴承的通用结构设计方法,并利用有限元软件ANSYS对此方法实例设计的磁力轴承作了电磁场分析,验证了设计方法的可行性。然后利用matlab软件设计求解了多组同极结构和传统结构的径向磁力轴承,通过结构尺寸曲线图比较了在相同设计要求下,两种结构的尺寸大小关系,得出在某些场合,同极结构更加适用的结论。第三,借助磁悬浮盘片实验装置,通过类比实验,证明了同极结构径向磁力轴承的向心效应比传统结构更强。其次,通过盘片的旋转实验,证明了同极结构径向磁力轴承的磁滞损耗相对于传统结构更小的推断。最后,对整个研究工作作了总结与展望。
[Abstract]:There are different pole structure and the homopolar structure two main active radial magnetic bearings, the traditional heteropolar structural radial magnetic bearing magnetic field is perpendicular to the rotor axis, while the radial magnetic bearing structure of the homopolar magnetic field lines are parallel to the axis of the rotor. The stator and the motor is similar to the traditional structure bearing, easy manufacture, and low coupling between. The advantages of homopolar structure significantly is the pole is easy to control, but this structure is difficult in processing and manufacturing precision is not high, so it is widely used in traditional heteropolar structural radial magnetic bearings. However, radial magnetic bearing homopolar structure compared to the traditional structure and some other advantages, in some special occasions than the heteropolar structure for more, so it is necessary to research the homopolar structure of the radial magnetic bearing.
The main research object is the radial magnetic bearing homopolar structure, main research method is based on the radial magnetic bearing the traditional structure for reference, mainly from the three aspects of structure design, the centripetal effect and energy loss of the homopolar structure of radial magnetic bearing is studied.
First of all, the basic theory of electromagnetic field as the basis, combined with the traditional structure design method of radial magnetic bearing structure, analyzes and summarizes the general structure design method of homopolar structure, magnetic bearing and design example of this method by using the finite element software ANSYS for the electromagnetic field analysis, verify the feasibility of the design method. Then using MATLAB software design for radial magnetic bearing groups of homopolar structure and the traditional structure, the structure size curves are compared in the same design requirements, the size of the relationship between two kinds of structures, that in some cases, the homopolar structure is more suitable. Conclusion third, magnetic disc experimental means, by analogy experiment, proved the centripetal the effect of homopolar structure is stronger than the traditional structure. Secondly, through the disc experimental, proved that the radial magnetic homopolar structure The hysteresis loss of the force bearing is smaller than that of the traditional structure. Finally, the whole research work is summarized and prospected.

【学位授予单位】：武汉理工大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH133.3

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