Abstract：Transformers are the key components in isolated switching mode power supplies to affect their electro-magnetic interference(EMI)characteristics.When using previous three-capacitor EMI model to evaluate the EMI noise,the error is greater than prediction when the noise frequency is high or when the transformer turns ratio is small.In this paper,firstly the influence of leakage magnetic field on noise potential distribution was analyzed,complemented with the effect of the secondary side coupling.Secondly the influences of the turn ratio structures on the EMI noise were compared and summarized.Based on these analyses,an improved EMI model of transformer with the consideration of leakage magnetic field was proposed.The proposed model was evaluated by using the parameter measurement method,which could describe the two-port characteristics of a transformer.Both experiment and simulation results confirm the theoretical analysis and model.
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. Electro-Magnetic Interference Model of Transformer Considering the Leakage Magnetic Field. Transactions of China Electrotechnical Society, 2017, 32(21): 143-152.
[1] 汪泉弟,安宗裕,郑亚利,等.电动汽车开关电源电磁兼容优化设计方法[J].电工技术学报,2014,29(9):225-231. Wang Quandi,An Zongyu,Zheng Yali,et al.Electromagnetic compatibility optimization design for switching power supply used in electric vehicle[J].Transactions of China Electrotechnical Society,2014,29(9):225-231. [2] 赵阳,夏欢,邱晓晖,等.基于独立分量分析算法的医疗电子设备辐射电磁干扰EMI噪声分析方法[J].电工技术学报,2015,30(17):180-190. Zhao Yang,Xia Huan,Qiu Xiaohui,et al.The radiated EMI analysis method for electromedical equipments based on ICA[J].Transactions of China Electrotechnical Society,2015,30(17):180-190. [3] 张佳佳,张逸成,韦莉,等.基于插入损耗的噪声源阻抗修正计算方法[J].电工技术学报,2015,30(4):80-87. Zhang Jiajia,Zhang Yicheng,Wei Li,et al.A revised calculation method for noise source impedance based on insertion loss[J].Transactions of China Electrotechnical Society,2015,30(4):80-87. [4] 赵志英,龚春英,秦海鸿.高频变压器分布电容的影响因素分析[J].中国电机工程学报,2008,28(9):121-126. Zhao Zhiying,Gong Chunying,Qin Haihong.Effect factors on stray capacitances in high frequency transformers[J].Proceedings of the CSEE,2008,28(9):121-126. [5] Lin S,Zhou M,Chen W,et al.Novel methods to reduce common-mode noise based on noise balance[C]//IEEE Power Electronics Specialist Conference,2006:2728-2733. [6] Kong P,Lee F C.Transformer structure and its effects on common mode EMI noise in isolated power converters[C]//The 25th Annual IEEE Applied Power Electronics Specialists Conference,2010:1424-1429. [7] 林苏斌,陈为,董纪清,等.Boost变换器共模噪声反相补偿法的高频特性分析与改善[J].中国电机工程学报,2013,33(27):52-59. Lin Subin,Chen Wei,Dong Jiqing,et al.High frequency behaviors analysis and improvement of anti-phase compensation method for CM EMI noise suppression in Boost converters[J].Proceedings of the CSEE,2013,33(27);52-59. [8] Chan Y P,Pong B M,Poon N K,et al.Common-mode noise cancellation in switching-mode power supplies using an equipotential transformer modeling technique[J].IEEE Transactions on Electromagnetic Compatibility,2012,54(3):594-602. [9] Fu D,Wang S,Kong P,et al.Novel techniques to suppress the common-mode EMI noise caused by transformer parasitic capacitances in DC-DC converters[J].IEEE Transactions on Industrial Electronics,2013,60(11):4968-4977. [10]郝全睿,徐政,黄莹,等.用于高频干扰计算的HVDC换流变压器模型[J].电工技术学报,2008,23(8):47-52. Hao Quanrui,Xu Zheng,Huang Ying,et al.Models of HVDC converter transformer for calculation ofhigh-frequency interference[J].Transactions of China Electrotechnical Society,2008,23(8):47-52. [11]Prieto R,Asensi R,Cobos J A,et al.Model of the capacitive effects in magnetic components [C]//The 26th Annual IEEE Applied Power Electronics Specialists Conference,1995:678-683. [12]Duerbaum T,Sauerlaender G.Energy based capacitance model for magnetic device[C]//The 16th Annual IEEE Applied Power Electronics Conference,2001:109-115. [13]Holguín F A,Asensi R,Prieto R,et al.A simplified capacitive model for center-tapped multi-windings transformers[C]//Applied Power Electronics Conference and Exposition,2015:2504-2511. [14]Liu Y,See K Y.Conducted electromagnetic interference simulation model with non-linear behaviour of transformer[J].IET Power Electronics,2015,8(4):602-609. [15]董纪清,陈为,卢增艺.开关电源高频变压器电容效应建模与分析[J].中国电机工程学报,2007,27(31):121-126. Dong Jiqing,Chen Wei,Lu Zengyi.Modeling and analysis of capacitive effects in high-frequency transformer of SMPS[J].Proceedings of the CSEE,2007,27(31):121-126. [16]陈庆彬,陈为.开关电源中变压器共模传导噪声抑制能力的评估方法[J].中国电机工程学报,2012,32(18):73-79. Chen Qingbin,Chen Wei.An evaluation method of transformer behaviors on the suppression of common-mode conduction noise in switch mode power supply[J].Proceedings of the CSEE,2012,32(18):73-79.
2017, Vol. 32 
