以均匀外磁场为激励的磁场计算通常以标量磁位构造边值问题，但涡流磁场等问题则须以矢量磁位作为位函数进行求解，目前尚无公开文献报道其均匀磁场的边界条件设置方法.为此，本文提出了两种基于矢量磁位的均匀磁场边界条件加载方法，通过分离变量法推导了其磁场解析解，并开展了有限元磁场仿真分析，解析计算和数值模拟均表明所提边界条件可产生均匀分布的磁感应强度，研究结果可为均匀时变磁场激励下的涡流磁场仿真提供参考.

Magnetic field calculations with a uniform external field as the excitation typically formulate boundary value problems using scalar magnetic potentials. However, for eddy current magnetic fields and similar problems, the vector magnetic potential must be employed as the governing potential function. Currently, there are no published literature reports on the method for setting boundary conditions for uniform magnetic fields using the vector magnetic potential. To address this, this paper proposes two boundary condition application methods based on vector magnetic potential. The analytical solutions for the magnetic field are derived using the separation of variables method, and then finite element magnetic field simulations are conducted. Both analytical calculations and numerical simulations demonstrate that the proposed boundary conditions generate uniformly distributed magnetic flux density. The findings provide references for eddy current magnetic field simulations under uniform timevarying magnetic field excitations.