高频变压器传导共模干扰分析与评估  

Analysis and Evaluation of Conducted Common-mode Interference of High-frequency Transformer

作　　者：傅恺宁 涂江涛 陈为[3] FU Kaining;TU Jiangtao;CHEN Wei(School of Electrical Engineering and Automation,Xiamen University of Technology,Xiamen 361024,China;Xiamen Key Laboratory of High-end Power Equipment and Intelligent Control,Xiamen 361024,China;College of Electrical Engineering and Automation,Fuzhou University,Fuzhou 350108,China)

机构地区：[1]厦门理工学院电气工程与自动化学院,厦门361024 [2]厦门市高端电力装备及智能控制重点实验室,厦门361024 [3]福州大学电气工程与自动化学院,福州350108

出　　处：《电源学报》2024年第5期37-43,共7页Journal of Power Supply

基　　金：国家自然科学基金资助项目(51777036);厦门市自然科学基金资助项目(3502Z202372043)。

摘　　要：为了搭建适合工程批量应用的高频变压器共模抑制特性评估平台,分析变压器的共模噪声传导机理,研究变压器通道上共模噪声的传导特性,评估变压器对共模噪声的抑制能力。首先,通过函数发生器产生高频跳变电位信号,将其施加于变压器原边绕组以模拟变压器的共模噪声传输特性;其次,采用示波器捕捉共模信号在采样电阻上产生的电压降的值,判断变压器对共模噪声的抑制效果,分析评估平台中采样电阻的阻值选取对评估结果的影响;最后,对比评估结果与传导电磁干扰频谱的测试结果,验证所提变压器共模抑制特性评估方法的有效性。An evaluation platform for the CM noise suppression characteristics of high-frequency transformer was established,which was suitable for batch applications in engineering.The conduction mechanism of common-mode(CM)noise in a transformer was analyzed,and the conduction characteristics of CM noise along the coupling path in the transformer was investigated for evaluating the transformer’s capability of suppressing the CM noise.First,a function generator was used to generate a high-frequency voltage pulsation signal,which was assigned on the primary winding of the transformer to simulate the transmission characteristics of CM noise.Then,an oscilloscope was used to capture the voltage drop generated by the CM signal on the sampling resistor to judge the suppression effect of the transformer on the CM noise,so as to analyze the influence of the sampling resistor selection on the evaluation results.The effectiveness of the proposed evaluation method for the CM noise suppression characteristics of transformer was verified by comparing the evaluation results with the test results of conducted electromagnetic interference spectrum.

关 键 词：高频变压器 共模 容性耦合 电磁干扰 

分 类 号：TM401[电气工程—电器]