Radial force (radial stiffness) is an important performance index of radial HTS magnetic bearing. However, it is difficult to calculate it due to the complexity and particularity of the structure. It is of great significance to establish an effective and convenient method to predict the radial force of radial bearing. In this paper, the moving mesh of COMSOL Multiphysics® software is introduced into the three-dimensional complete modeling of radial HTS magnetic bearing for the first time, so that the relative motion between the permanent magnet rotor and the HTS stator can be described easily. The complex boundary coupling can be avoided, and then the levitation force under different rotor displacements can be solved quickly. Compared with the traditional methods, this method is simple and convenient. At the same time, the effectiveness of the calculation is verified by the experimental results. Based on this method, the radial HTS magnetic bearing system with different geometric dimensions, different physical parameters and different motion forms can be calculated. Therefore, the results of this paper provide convenience for the design and characteristic research of radial HTS magnetic bearing.

径向力（径向刚度）是径向HTS电磁轴承的重要性能指标。但是，由于结构的复杂性和特殊性，很难对其进行计算。建立一种有效，方便的方法来预测径向轴承的径向力具有重要意义。在本文中，COMSOL的移动网格 首次将Multiphysics®软件引入径向HTS电磁轴承的三维完整建模中，从而可以轻松描述永磁转子和HTS定子之间的相对运动。避免了复杂的边界耦合，从而可以快速解决不同转子位移下的悬浮力。与传统方法相比，该方法简单方便。同时，实验结果验证了计算的有效性。基于这种方法，可以计算出具有不同几何尺寸，不同物理参数和不同运动形式的径向HTS电磁轴承系统。因此，本文的研究结果为径向HTS电磁轴承的设计和特性研究提供了方便。