[10] [10] CHOI G S, YOON S Y, BAEK S H, et al. Power loss calculation of high frequency transformers ［J］. J Elec Engineer & Technol, 2006, 1(3): 338-342.

[13] [13] KEFALAS T D, KLADAS A G. Advanced computational tools for wound core distribution transformer no-load analysis ［J］. Compel Int J Comput & Mathem Elec, 2012, 31(2): 682-691.