摘要
AC/DC通信电源产生的电磁辐射易超过限值,对其电磁辐射机理和预测方法开展研究有助于改善电磁兼容性设计。首先,在分析AC/DC通信电源模块共模电磁噪声的形成源头和传播路径后,提出其远场电磁辐射可分解为由“输入端口”、“输出端口”共模电压驱动的2类辐射。然后,提出将共模电压驱动源与寄生辐射体的辐射传递函数相结合,进行远场电磁辐射预测的新方法;设计频谱分析仪+电阻衰减器,实现各共模电压驱动源的频谱测量;采用FEKO电磁仿真软件,通过数值计算得到各寄生辐射体的辐射传递函数。最后,实现了4 kW AC/DC通信电源模块辐射预测,并实测验证了其有效性。
The electromagnetic radiation emitted by an AC/DC telecommunication power supply is prone to exceeding the limit standards,so the researches on its electromagnetic radiation mechanism and prediction methods can improve the corresponding electromagnetic compatibility(EMC)design.First,after the analysis of the source and propagation path of common-mode(CM)electromagnetic interference in an AC/DC telecommunication power supply module,it is suggested that its far-field electromagnetic radiation can be decomposed into two types,which are driven by input-port and output-port CM voltages,respectively.Then,a novel method of far-field electromagnetic radiation prediction is proposed by combining the CM voltage-driven sources with the radiation transfer functions of parasitic radiators.The spectrum measurement of each CM voltage-driven source is realized by designing a spectrum analyzer and a resistor attenuator,and the radiation transfer functions of each parasitic radiator is numerically calculated using an electromagnetic simulation software FEKO.Finally,the radiation prediction of a 4 kW AC/DC telecommunication power supply module was achieved,and the effectiveness of the proposed prediction method was verified by test results.
作者
王伟新
舒俊华
睢宁宁
和军平
WANG Weixin;SHU Junhua;SUI Ningning;HE Junping(School of Mechanical Engineering and Automation,Harbin Institute of Technology,Shenzhen,Shenzhen 518055,China)
出处
《电源学报》
CSCD
北大核心
2024年第5期44-51,共8页
Journal of Power Supply
基金
国家自然科学基金资助项目(52077046)
深圳市科创委科技攻关计划资助项目(JSGG20201201100406017)。
关键词
AC/DC通信电源
远场辐射发射
电磁预测
电磁仿真
寄生辐射体
AC/DC telecommunication power supply
far-field radiated emission
electromagnetic prediction
electromagnetic simulation
parasitic radiator
