控制棒驱动机构用电磁轴承本体电磁结构设计研究

电磁结构设计是控制棒驱动机构用电磁轴承本体设计的核心环节。为了获得合理的电磁结构，针对不同磁通分布形式进行了电磁结构选型，建立了用于电磁分析的解析模型和有限元模型；然后采用有限元仿真分析的方法确定了电磁轴承的工作点，并对电流刚度和位移刚度等电磁轴承关键性能参数进行了深入分析研究；最后采用有限元仿真分析结果与解析计算结果对比的方式进行了互算验证。验证结果表明，控制棒驱动机构用电磁轴承本体电磁结构设计合理，各项性能指标均可满足设计要求。 

Study on Electromagnetic Structure Design of Electromagnetic Bearing Body for Control Rod Drive Mechanism

The electromagnetic structure design is the core of the design of electromagnetic bearing body for control rod drive mechanism (CRDM). In order to obtain a reasonable electromagnetic structure, a certain electromagnetic structure is selected according to different shapes of magnetic flux distribution, and used to build the analytical model and finite element model for electromagnetic analysis. Then, the working point of the electromagnetic bearing is determined by finite element simulation and analysis, and the key performance parameters, such as current stiffness and displacement stiffness, of the electromagnetic bearing are further analyzed and studied. Finally, cross verification is performed by comparison between the finite element simulation and analysis results and the analytical calculation results. The verification results show that the electromagnetic structure design of the CRDM electromagnetic bearing body is appropriate, and all performance indexes can meet the design requirements.