考虑定子外壳漏磁的同极式永磁偏置径向磁轴承磁路模型

发布时间：2018-04-10 00:37

本文选题：磁轴承　切入点：解析模型　出处：《电工技术学报》2017年11期

【摘要】：同极式永磁偏置径向磁轴承的永磁偏置磁场在定子外壳内形成较大漏磁,而且外壳的有效面积相对工作气隙较大,即使在铁心与外壳间加入隔磁层的情况下,漏磁仍不可忽略,必须进行准确计算。首先直接求解拉普拉斯方程获得隔磁层内的磁场分布,并结合保角变换计算漏磁区域的端部效应,然后求解工作气隙的永磁偏置磁场和电励磁控制磁场,最后建立完整磁路模型和电磁力解析模型。三维有限元仿真结果表明,所建立的磁路模型能准确计算磁轴承工作范围的电磁参数。依据飞轮储能系统的总体需求,设计了径向磁轴承系统,实验结果验证了所建立解析模型和有限元模型的准确性。
[Abstract]:The permanent magnet bias magnetic field of the same pole permanent magnet offset radial magnetic bearing forms a large magnetic leakage in the stator housing, and the effective area of the shell is relatively large relative to the working air gap, even if the magnetic barrier layer is added between the core and the housing, the magnetic leakage can not be ignored.Accurate calculations must be made.The magnetic field distribution in the magnetic layer is obtained by solving the Laplace equation directly, and the end effect of the magnetic leakage region is calculated by combining the conformal transformation, and then the permanent magnet bias magnetic field and the electrically controlled magnetic field of the air gap are solved.Finally, a complete magnetic circuit model and an analytical model of electromagnetic force are established.The three dimensional finite element simulation results show that the established magnetic circuit model can accurately calculate the electromagnetic parameters of the working range of the magnetic bearing.According to the overall requirement of flywheel energy storage system, the radial magnetic bearing system is designed. The experimental results verify the accuracy of the analytical model and the finite element model.
【作者单位】：海军工程大学舰船综合电力技术国防科技重点实验室;
【基金】：国家自然科学基金项目(51137005,51407192) 国家自然科学重点基础研究发展计划(973计划)项目(2013CB035601)资助
【分类号】：TH133.3

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