基于传导骚扰和辐射骚扰混合EMI噪声一体化抑制方法研究
发布时间：2018-12-15 02:15
【摘要】：近年来,随着高频电子器件不断进步和持续发展,电力线缆上高频电磁干扰问题日趋突出,设计性能较好的滤波器成为亟待解决的问题。本文针对工程实践中的EMI整改问题,区别于先前对传导电磁骚扰与辐射电磁骚扰的单独研究,提出了噪声混合一体化抑制的思路,并对电源线缆一体化传导/辐射EMI滤波器展开了理论分析与应用研究。(1)对电源线缆一体化传导/辐射EMI滤波器的理论基础进行了研究。本文通过对传导电磁干扰和辐射电磁干扰模型的研究,得出两种电磁干扰的抑制机理。同时将复杂电子设备中的线缆分为交流电源线缆、直流电源线缆、数字控制线缆、传感器线缆,得出四种线缆的辐射噪声机理,建立了相应的远场辐射噪声模型。由于耦合效应,各种电缆的辐射噪声叠加于交流电缆线路中,因此交流电缆为有效且易行的整改点,成为滤波器主要滤波位置。(2)对电源线缆一体化传导/辐射EMI滤波器进行结构设计。在普通传导滤波器的基础上增加辐射滤波器,并将辐射滤波器的噪声抑制频段,划分为低频噪声段、中频噪声段、高频噪声段三个部分,使用电容电感、磁环、金属管套对三个频段分别进行噪声抑制。(3)对电源线缆一体化传导/辐射EMI滤波器经行综合应用研究,以三款实际医疗电子设备为研究对象,利用本文提出的方法设计,对其电磁干扰问题进行了分析和抑制。在钠硫储能变流器通讯模块中安装电容滤波;在吸痰器中安装电感电容及磁环组成的滤波器,在经络导平治疗仪上安装电容、磁环、金属套管。详细论述了传导骚扰和辐射骚扰的分析和抑制过程,检测结果满足标准限值要求,验证了噪声混合一体化抑制思路的可行性,为今后传导电磁干扰噪声抑制的工程应用提供理论和实践依据。
[Abstract]:In recent years, with the continuous progress and continuous development of high-frequency electronic devices, the problem of high-frequency electromagnetic interference (HF-EMI) on power cables has become increasingly prominent, and the design of filters with better performance has become an urgent problem to be solved. Aiming at the problem of EMI rectification in engineering practice, different from the previous research on conducting electromagnetic disturbance and radiation electromagnetic disturbance, this paper puts forward the idea of noise mixed integration suppression. The theoretical analysis and application of the integrated power cable conduction / radiation EMI filter are carried out. (1) the theoretical basis of the power cable integrated conduction / radiation EMI filter is studied. In this paper, the suppression mechanisms of two kinds of electromagnetic interference are obtained by studying the models of conducting electromagnetic interference and radiation electromagnetic interference. At the same time, the cable in complex electronic equipment is divided into AC power cable, DC power cable, digital control cable and sensor cable. The radiation noise mechanism of four kinds of cable is obtained, and the corresponding far-field radiation noise model is established. Because of the coupling effect, the radiation noise of all kinds of cables is superimposed on the AC cable line, so the AC cable is an effective and easy rectification point. It is the main filter position. (2) structural design of integrated conduction / radiation EMI filter with power cable. The radiation filter is added to the common conduction filter, and the noise suppression frequency band of the radiation filter is divided into three parts: the low frequency noise section, the intermediate frequency noise section, the high frequency noise section, the capacitor inductance, the magnetic ring, The metal tube sleeve carries on the noise suppression to the three frequency bands separately. (3) to the power cable integration conduction / radiation EMI filter meridian synthesis application research, takes three actual medical electronic equipment as the research object, uses the method proposed in this paper design, The electromagnetic interference is analyzed and suppressed. The capacitor filter is installed in the communication module of the sodium sulfur energy storage converter, the filter composed of inductance capacitance and magnetic ring is installed in the sputum suction device, and the capacitance, magnetic ring and metal casing are installed on the meridian conduction level therapeutic instrument. The analysis and suppression process of conducting disturbance and radiation disturbance are discussed in detail. The detection results meet the requirements of the standard limit value and verify the feasibility of the idea of integrated noise suppression. It provides a theoretical and practical basis for the engineering application of EMI suppression in the future.
【学位授予单位】：南京师范大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN03;TN713
本文编号：2379768
[Abstract]:In recent years, with the continuous progress and continuous development of high-frequency electronic devices, the problem of high-frequency electromagnetic interference (HF-EMI) on power cables has become increasingly prominent, and the design of filters with better performance has become an urgent problem to be solved. Aiming at the problem of EMI rectification in engineering practice, different from the previous research on conducting electromagnetic disturbance and radiation electromagnetic disturbance, this paper puts forward the idea of noise mixed integration suppression. The theoretical analysis and application of the integrated power cable conduction / radiation EMI filter are carried out. (1) the theoretical basis of the power cable integrated conduction / radiation EMI filter is studied. In this paper, the suppression mechanisms of two kinds of electromagnetic interference are obtained by studying the models of conducting electromagnetic interference and radiation electromagnetic interference. At the same time, the cable in complex electronic equipment is divided into AC power cable, DC power cable, digital control cable and sensor cable. The radiation noise mechanism of four kinds of cable is obtained, and the corresponding far-field radiation noise model is established. Because of the coupling effect, the radiation noise of all kinds of cables is superimposed on the AC cable line, so the AC cable is an effective and easy rectification point. It is the main filter position. (2) structural design of integrated conduction / radiation EMI filter with power cable. The radiation filter is added to the common conduction filter, and the noise suppression frequency band of the radiation filter is divided into three parts: the low frequency noise section, the intermediate frequency noise section, the high frequency noise section, the capacitor inductance, the magnetic ring, The metal tube sleeve carries on the noise suppression to the three frequency bands separately. (3) to the power cable integration conduction / radiation EMI filter meridian synthesis application research, takes three actual medical electronic equipment as the research object, uses the method proposed in this paper design, The electromagnetic interference is analyzed and suppressed. The capacitor filter is installed in the communication module of the sodium sulfur energy storage converter, the filter composed of inductance capacitance and magnetic ring is installed in the sputum suction device, and the capacitance, magnetic ring and metal casing are installed on the meridian conduction level therapeutic instrument. The analysis and suppression process of conducting disturbance and radiation disturbance are discussed in detail. The detection results meet the requirements of the standard limit value and verify the feasibility of the idea of integrated noise suppression. It provides a theoretical and practical basis for the engineering application of EMI suppression in the future.
【学位授予单位】：南京师范大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN03;TN713
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