中大功率变频器输入端无源EMI滤波器研究与设计

发布时间：2018-03-15 21:05

本文选题：电磁兼容　切入点：变频器　出处：《山东大学》2015年硕士论文　论文类型：学位论文

【摘要】：中大功率变频器因其具有转矩高、功率大、正反转加减速调节方便、能够进行软启动、功率因数补偿、能量回馈节能等特点使其在工业领域电气传动系统中发挥着越来越重要的作用,但是中大功率变频器系统会产生高幅值、宽频段的传导型、辐射型电磁干扰,污染供电电网的电磁环境,影响附近电气、电子设备的正常工作,所以与之相关的电磁兼容方面的研究也成为中大功率变频器系统开发与应用中的至关重要的一个环节。本文针对于中大功率变频器系统输入端对电网产生的严重的电磁传导干扰,在阐述变频器系统的电磁噪声特点与电磁兼容要求的基础上,对无源滤波器的设计理论基础进行了详细的分析,如二端口网络、阻抗失配、系统等效电路、高频模型、接地系统等。然后从设计实践的角度阐述了EMI滤波器元器件类型、参数的选取依据,拓扑结构的确定方法,实际布局的参照标准,设计了一款能够使中大功率变频器系统噪声得到很好衰减的EMI无源滤波器。最后,结合在相关课题中大量的实验、测量经验,介绍了电磁兼容检测时与EMI无源滤波器相关的设备测试、安装、布局等实验方法,并进行了相关的EMI噪声测试,通过EMI无源滤波器对EMI噪声的抑制,使变频器系统达到了国家相关电磁兼容标准,并总结了一系列的整改措施、注意事项等内容。
[Abstract]:Because of its high torque, high power, convenient adjustment of positive and inverse speed and deceleration, medium and large power converter can start soft and compensate for power factor. The characteristics of energy feedback and energy saving make it play a more and more important role in the electric transmission system in the industrial field, but the medium and large power converter system will produce high amplitude, wide band conduction and radiation electromagnetic interference. Polluting the electromagnetic environment of the power supply network, affecting the normal operation of the electrical and electronic equipment nearby, Therefore, the research on electromagnetic compatibility has become a very important link in the development and application of medium and large power converter system. This paper aims at the serious problem that the input end of medium and large power converter system produces to the power network. Electromagnetic conduction interference, Based on the description of electromagnetic noise characteristics and electromagnetic compatibility requirements of inverter system, the design theory of passive filter is analyzed in detail, such as two-port network, impedance mismatch, system equivalent circuit, high frequency model, etc. Then from the point of view of design practice, this paper expounds the type of EMI filter components, the basis of parameter selection, the method of determining topology structure, the reference standard of actual layout, and so on. This paper designs a EMI passive filter which can attenuate the system noise of medium and large power frequency converter. Finally, combined with a large number of experiments in related subjects, the measurement experience is given. This paper introduces the equipment test, installation, layout and other experimental methods related to EMI passive filter in EMC detection, and carries out the related EMI noise test. The EMI passive filter is used to suppress the EMI noise. The inverter system meets the national EMC standards, and summarizes a series of rectification measures, matters needing attention and so on.
【学位授予单位】：山东大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN713;TM921.51

【共引文献】