Calculation of eddy current loss for magnetic thrust bearings
Calculation of eddy current loss for magnetic thrust bearings
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DOI：
10.1177/1350650111409824
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发表时间：
2011-08
期刊：
影响因子：
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通讯作者：
Ys Tian;Y-H Sun;L. Yu
中科院分区：
文献类型：
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作者：
Ys Tian;Y-H Sun;L. Yu
基于有效磁阻和磁路定理，建立了磁推力轴承涡流损耗的磁路模型。考虑涡流的趋肤效应，在磁通路径中引入有效磁阻，分析了磁通、线圈阻抗和涡流损耗。此外，考虑材料非线性、漏损、边缘磁通等影响因素，对MTB有限元法模型和磁路模型进行了谐波分析，并对结果进行了比较。结果表明，在上述两种模型中，磁通量和线圈阻抗具有相同的频域特性。两种模型计算的涡流损耗与实验结果吻合较好。
A magnetic circuit model of eddy current loss for a magnetic thrust bearing (MTB) is presented based on the effective reluctance and the magnetic circuit theorem. Considering the skin effect of eddy current, the effective reluctance is introduced into the flux path, and the magnetic flux, coil impedance and eddy current loss are analysed. In addition, a harmonic analysis on the finite element method model of the MTB and the magnetic circuit model is conducted and the results are compared in consideration of such affecting factors as material non-linearity, leakage, and fringing flux. It shows that the magnetic flux and the coil impedance have the same frequency domain properties in the above two models. The eddy current losses derived from these two models agree well with the experimental results.