Design and Optimization of a Radial Hybrid Magnetic Bearing With Separate Poles for Magnetically Suspended Inertially Stabilized Platform
Design and Optimization of a Radial Hybrid Magnetic Bearing With Separate Poles for Magnetically Suspended Inertially Stabilized Platform
复制标题
DOI：
10.1109/tmag.2013.2293482
复制
发表时间：
2014-05
影响因子：
2.1
通讯作者：
Jiancheng Fang;Chun-e Wang;Tong Wen
中科院分区：
文献类型：
--
作者：
Jiancheng Fang;Chun-e Wang;Tong Wen
为了减轻径向混合磁轴承（RHMB）在大轴颈直径应用中的质量，本文研究了结构参数之间的关系，并提出了一种分极式径向混合磁轴承的优化方法。设计的 RHMB 由四个独立的磁极组成，并带有一个辅助气隙，以帮助控制磁通形成回路。考虑次级气隙对偏置磁通和控制磁通大小的影响，基于磁路分析对次级气隙磁阻进行优化，结果表明最优值仅由永磁体磁阻和气隙磁阻决定。整个RHMB的优化考虑了四个约束：最大力、铜损、气隙磁通密度和二次气隙磁通密度。经过一系列分析发现，RHMB的铜损主要取决于磁极的几何尺寸，与线圈匝数或控制线圈的电流无关。通过顺序二次规划优化方法，得到了结构参数。然后采用有限元方法模拟了磁通密度的分布，结果与磁路分析结果一致。基于优化设计制造样机，并通过电流刚度和位移刚度实验验证了优化设计结果。
To decrease the mass of the radial hybrid magnetic bearing (RHMB) when used in large journal diameter application, this paper researches the relationships of the structure parameters and presents an optimization method for an RHMB with separate poles. The designed RHMB is composed of four separate magnetic poles, with a secondary air gap constructed to help the control flux form its loop. Considering the effect of the secondary air gap to the value of both bias flux and control flux, the reluctance of the secondary air gap is optimized based on the magnetic circuit analysis, and the optimum value turns out to be determined by the reluctances of permanent magnet and the air gap only. The optimization of the whole RHMB is conducted with four constraints considered: the maximum force, copper loss, flux density of the air gap, and flux density of the secondary air gap. After a series of analyses, it is found that the copper loss of the RHMB depends mainly on the geometric size of the magnetic pole, and has no relationship with the number of coil turns or the current of the control coil. By the optimization method of sequential quadratic programming, the structure parameters have been obtained. Then the finite element method is adopted to simulate the distribution of the flux density, and the result is in accordance with that of the magnetic circuit analysis. The prototype is manufactured based on the optimal design, and the experiment carried out on the current stiffness and displacement stiffness verified the design result of the optimization.