Although many researches on superconducting air-core transformers have been carried out, it is mainly on the power frequency situation. The high-frequency characteristics of superconducting air-core transformers are still unclear. In this paper, we applied experimental and finite element simulation approach to study the operation and loss characteristics of high frequency superconducting air-core transformer made by YBa2Cu3O7−δ (YBCO) tapes. The numerical model established is based on the H formula and the E–J power law, and the edge degradation and anisotropy of the critical current density of the tape are considered in the model. The results show that the operating characteristics of superconducting transformers are significantly different from those of conventional transformers, and their operating characteristics have strong frequency and power dependence. The obtained findings can provide a theoretical basis for the design of high-frequency resonant transformers.

虽然对超导空芯变压器进行了很多研究，但主要是针对工频情况。超导空芯变压器的高频特性尚不清楚。在本文中，我们应用实验和有限元模拟方法研究了由 YBa2Cu3O7−δ (YBCO) 带制成的高频超导空芯变压器的运行和损耗特性。建立的数值模型基于H公式和E - J幂律，模型中考虑了胶带临界电流密度的边缘退化和各向异性。结果表明，超导变压器的运行特性与常规变压器有显着差异，其运行特性具有很强的频率和功率依赖性。研究结果可为高频谐振变压器的设计提供理论依据。