高温超导空心变压器椭圆磁场计算分析

Calculation and analysis of elliptical magnetic field in HTS air-core transformer

变压器的磁场研究对于高温超导变压器的设计具有非常重要的意义,尤其是对高温超导空心变压器。由于每一条磁力线均直接作用于线圈,因此磁场对高温超导空心变压器临界电流和交流损耗磁场的影响更为显著。文中通过数学计算,得出高温超导空心变压器在其空间任一点产生的磁场为形状和大小,论证了该磁场为带旋转分量的椭圆形磁场,并通过有限元仿真验证计算结果。

The magnetic field analysis is very important for high temperature superconducting transformers, especially for air - core HTS transformers, as the magnetic flux produced by its windings acts on each turn of the superconducting windings directly, which has significant influence on their critical current and ac loss. The paper presented a mathematical method to calculate and analyze the magnetic field of air - core HTS transformer and proved that the magnetic field under load of any single point in its space generated by air - core HTS transformer was elliptical and had a rotating component. Apart from these, a simulation re- suh was provided to validate the calculation.