Abstract：The traditional transformer model is mostly a lumped capacitance model. There is a large deviation between the frequency model characteristics and the actual measurement above 10MHz. It is difficult to reflect the high-frequency electro-magnetic interference (EMI) characteristics of the transformer. In this paper, the S21 parameter was used to measure the common mode EMI performance of transformers. The high-frequency 3D modeling method of planar transformer was studied. The accuracy of the 3D modeling method was verified by actual tests. The modeling method was applied to the common mode EMI performance evaluation and optimization design of a high-frequency transformer. From the aspects of manufacturing process level and material property parameters, the key factors affecting the consistency of common mode S21 parameters of transformers were analyzed, and the quality control bias was provided to improve the consistency of product performance.
高璐, 徐策, 董光, 龚春英, 张方华. 基于电磁仿真软件的平面变压器共模电磁干扰建模方法及其应用[J]. 电工技术学报, 2020, 35(24): 5057-5063.
Gao Lu, Xu Ce, Dong Guangdong, Gong Chunying, Zhang Fanghua. Common Mode Electro-Magnetic Interference Modeling Method of Planar Transformers Based on CST Software and Its Application. Transactions of China Electrotechnical Society, 2020, 35(24): 5057-5063.
[1] 钱照明, 陈恒林. 电力电子装置电磁兼容最新进展[J]. 电工技术学报, 2007, 22(7): 1-11. Qian Zhaoming, Chen Henglin.State of art of electromagnetic compatibility research on power electronics equipment[J]. Transactions of China Electrotechnical Society, 2007, 22(7): 1-11. [2] Chao Fei, Lee F C, Li Qiang.High-efficiency high- power-density LLC converter with and integrated planar matrix transformer for high-output appli- cations[J]. IEEE Transactions on Industrial Electro- nics, 2017, 64(11): 9072-9082. [3] 张逸成, 叶尚斌, 张佳佳, 等. 电力电子设备传导噪声抑制措施研究综述[J]. 电工技术学报, 2017, 32(14): 77-86. Zhang Yicheng, Ye Shangbin, Zhang Jiajia, et al.Review of conducted noise suppression method for power electronic and electrical equipment[J]. Transa- ctions of China Electrotechnical Society, 2017, 32(14): 77-86. [4] Chung H, Hui S Y R, Tse K K. Reduction of power converter EMI emission using soft-switching technique[J]. IEEE Transactions on EMC, 1998, 40(3): 282-288. [5] Shoyama M, Li Ge, Ninomiya T.Balanced switching converter to reduce common-mode conducted noise[J]. IEEE Transactions on Industrial Electronics, 2003, 50(6): 1095-1099. [6] Cochrane D, Chen D Y, Boroyevic D.Passive cancellation of common-mode noise in power electronic circuits[J]. IEEE Transactions on Power Electronics, 2003, 18(3): 756-763. [7] Bai Yongjiang, Yang Xu, Zhang Dan, et al.Con- ducted EMI mitigation schemes in isolated switching- mode power supply without the need of a Y-capacitor[J]. IEEE Transactions on Power Electronics, 2017, 32(4): 2687-2703. [8] 江师齐, 刘艺涛, 银杉, 等. 基于噪声阻抗提取的单相逆变器电磁干扰滤波器的设计[J]. 电工技术学报, 2017, 34(17): 3552-3562. Jiang Shiqi, Liu Yitao, Yin Shan, et al.Elec- tromagnetic interference filter design of single-phase inverter based on the noise source impedance extraction[J]. Transactions of China Electrotechnical Society, 2017, 34(17): 3552-3562. [9] 张举良, 高志强, 董全智, 等. 光伏发电直流侧共模电压干扰的抑制研究[J]. 电力系统保护与控制, 2019, 47(14): 102-108. Zhang Juliang, Gao Zhiqiang, Dong Quanzhi, et al.Research on suppression of photovoltaic DC side common-mode voltage interference[J]. Power System Protection and Control, 2019, 47(14): 102-108. [10] Xie Lihong, Ruan Xinbo, Ye Zhihong.Equivalent noise source: an effective method for analyzing common-mode noise in isolated power converters[J]. IEEE Transactions on Industrial Electronics, 2015, 63(5): 2913-2924. [11] Zhang Huan, Wang Shuo, Wang Qinghai.Two- capacitor transformer winding capacitance models for common-mode EMI noise analysis in isolated DC-DC converters[J]. IEEE Transactions on Power Electro- nics, 2017, 32(11): 8458-8468. [12] Li Yiming, Zhang Huan, Wang Shuo, et al.Investi- gating switching transformers for common mode EMI reduction to remove common mode EMI filters and Y-capacitors in flyback converters[J]. IEEE Journal of Emerging and Selected Topics in Power Elec- tronics, 2018, 6(4): 2287-2301. [13] 董纪清, 陈晓威, 林苏斌. 考虑漏磁特性的变压器电磁干扰特性模型[J]. 电工技术学报, 2017, 32(21): 143-152. Dong Jiqing, Chen Xiaowei, Lin Subin.Electromagnetic interference model of transformer considering the leakage magnetic field[J]. Transactions of China Electrotechnical Society, 2017, 32(21): 143-152. [14] 林苏斌, 陈为, 董纪清, 等. 开关电源变压器传导共模EMI磁电综合模型[J]. 中国电机工程学报, 2017, 37(8): 2436-2445. Lin Subin, Chen Wei, Dong Jiqing, et al.Magneto- electric composite model of transformer for con- ducted common-mode EMI in switching-mode power supply[J]. Proceedings of the CSEE, 2017, 37(8): 2436-2445. [15] European Norm Standard EN 55022, Limits and methods of measurement of radio disturbance characteri- stics of information technology equipment[S]. 2006. [16] 张敏. CST微波工作室用户全书[M]. 成都: 电子科技大学出版社, 2004. [17] Xie Lihong, Ruan Xinbo, Ji Qing, et al.Shielding- cancellation technique for suppressing common-mode EMI in isolated power converters[J]. IEEE Transa- ctions on Industrial Electronics, 2015, 62(5): 2814-2822. [18] Wang Shuo, Lee F C, Odendaal W G.Characteri- zation and parasitic extraction of EMI filters using scattering parameters[J]. IEEE Transactions on Power Electronics, 2005, 20(2): 502-510.
2020, Vol. 35 
