HTS magnetic bearing is one of the important applications of HTS suspension system. It is a relatively complicated problem to describe the relative motion of superconductor and permanent magnet in the numerical calculation of HTS suspension system. For this problem, firstly, this paper analyzes the characteristics and limitations of the existing methods, and then proposes a new solution: using the COMSOL Multiphysics® to solve the magnetic scalar potential and magnetic field intensity for the permanent magnetic domain and the superconducting domain respectively, and then coupled them. The domain of solving the magnetic scalar potential can use discontinuous meshes to ensure the continuity of the physical field, thereby the problem of the relative motion can be solved effectively, and the complex structure can also be modeled easily and calculated quickly. Finally, this paper selects two different forms of motion of the HTS magnetic bearing for calculation, and compares them with the experimental results reported publicly. The results show that within the acceptable error range in engineering, the modeling and calculation in this paper can describe the motion process of the system quantitatively, so it can be used to design, optimize and study the characteristics of HTS magnetic bearing.

HTS电磁轴承是HTS悬挂系统的重要应用之一。在HTS悬挂系统的数值计算中，描述超导体和永磁体的相对运动是一个相对复杂的问题。针对这一问题，本文首先分析了现有方法的特点和局限性，然后提出了一种新的解决方案：使用COMSOLMultiphysics®分别求解永磁域和超导域的标量势和磁场强度，然后将它们耦合。解决磁标量势的领域可以使用不连续的网格来确保物理场的连续性，从而可以有效地解决相对运动的问题，复杂的结构也可以轻松建模并快速计算。最后，本文选择了HTS电磁轴承的两种不同形式的运动进行计算，并将它们与公开报道的实验结果进行比较。结果表明，在工程可接受的误差范围内，本文的建模和计算可以定量描述系统的运动过程，因此可以用于设计，优化和研究高温超导磁性轴承的特性。