基于AC-LINK技术的大功率充电模块EMI滤波器研究

发布时间：2018-06-23 00:55

本文选题：充电模块 + EMI滤波器　；参考：《西南交通大学》2017年硕士论文

【摘要】：随着全球环境污染和化石能源危机的加剧,节能减排的需求日益迫切,新能源汽车作为无尾气污染、能耗较低的电动交通工具获得大力发展的机遇,同时也大大推动了作为基础配套设备的充电电源技术的不断进步。目前,国内外都在积极开发各种类型的电动汽车充电电源,大功率直流充电模块因能实现电动汽车快速充电正在成为目前的主流方向和研究热点。基于AC-link技术的充电模块作为大功率能量变换装置,具有较为复杂的内部结构和控制方式,且其半导体开关器件的高dv/dt、di/dt造成非常严重的传导干扰问题。EMI滤波器是抑制开关电源传导干扰的常用措施,本文对基于AC-link技术的大功率充电模块的EMI滤波器进行了研究。首先介绍了开关电源EMI滤波器及开关电源传导干扰的国内外研究现状,并简要阐述了本文研究的目的和意义,同时对本文的主要工作和行文安排进行了必要的说明。简述了基于AC-link技术的大功率充电模块的拓扑结构、基本工作原理和控制方式,分析了充电模块传导干扰产生机理,针对共模干扰和差模干扰,分别理论分析了其干扰源和干扰传播路径。然后,开展了大功率充电模块传导干扰的测试研究。采用电流探头法对充电模块传导干扰进行了测试,并分离了其共模干扰、差模干扰。给出充电模块传导干扰测试的一般要求,并将CISPR规定的适用于大电流的单相人工电源网络扩展为三相,设计了基于电流探头法的充电模块传导干扰测试方案,给出了详细的结果处理方法。根据测试方案完成了充电模块传导干扰试验,并采用三相共模、差模标量分离方法得到了其共模干扰和差模干扰频谱,通过与标准限值的对比确定干扰超标情况及电磁兼容整改方向。接着,开展了三相EMI滤波器的改进设计研究。基于三相EMI滤波器插入损耗仿真分析方法,对工作在大电流条件下的充电模块三相EMI滤波器进行了改进设计。基于滤波电容厂商提供的阻抗幅频曲线建立其高频等效电路,通过阻抗分析仪对共模电感、共模电感漏感、差模电感阻抗幅频曲线进行测试,建立对应的高频等效电路,采用电磁分析软件提取印制板走线寄生参数,根据CISPR 17对EMI滤波器插入损耗测试电路的规定,建立其共模和差模仿真模型分析了其插入损耗。基于仿真结果和充电模块传导干扰测试结果对EMI滤波器进行改进设计,并对改进设计后的滤波器及采用该滤波器的充电模块进行了试验验证。最后,研究了一种适应复杂控制方式和拓扑结构的充电模块传导干扰仿真分析方法,分析了 EMI滤波器在充电模块中的插入损耗。在系统仿真软件中建立包括EMI滤波器、汇流排等效电路模型、IGBT电路模型、变压器高频等效电路模型等元件的充电模块传导干扰电路分析模型,并在Simulink中建立其控制算法模型,通过联合建模得到了充电模块传导干扰仿真模型。仿真分析了汇流排寄生参数、功率器件寄生电容、驱动信号上升时间等EMC关键元件或参数对充电模块传导干扰的影响。仿真分析了三相EMI滤波器在充电模块中的插入损耗,并和单独建模滤波器时得到的插入损耗进行了对比。联合建模为在设计阶段模拟评估某些电磁兼容设计或参数对充电模块传导干扰的作用提供参考方法。
[Abstract]:With the global environmental pollution and the intensification of the fossil energy crisis, the demand for energy saving and emission reduction is becoming more and more urgent. As a new energy vehicle, the new energy vehicle, as a non exhaust pollution and low energy consumption electric vehicle, has greatly promoted the continuous progress of the charge source technology as a basic equipment. The charging power of various types of electric vehicles is developed very much. The high power DC charging module is becoming the mainstream and research hot spot because it can realize electric vehicle fast charging. As a high-power energy conversion device, the charging module based on AC-link technology has more complex internal structure and control mode and its semiconductor switch. The high dv/dt, di/dt cause very serious conduction interference problem,.EMI filter is a common measure to suppress the conduction interference of switching power supply. In this paper, the EMI filter of high power charging module based on AC-link technology is studied. First, the research status of the switched power EMI filter and the conduction interference of the switching power supply is introduced. The purpose and significance of the study are briefly described, and the main work and the arrangement of the text are explained. The topology, basic principle and control mode of the high-power charging module based on AC-link technology are briefly described. The mechanism of the conduction interference in the charging module is analyzed, and the common mode interference and the differential mode dry are analyzed. The interference source and the interference propagation path are analyzed in theory respectively. Then, the test research on the conduction interference of the high-power charging module is carried out. The current probe method is used to test the conductive interference of the charging module, and the common mode interference and differential mode interference are separated. The general requirements for the conduction interference test of the charging module are given, and the CISPR is stipulated. The single-phase artificial power supply network suitable for large current is extended into three phases. A current probe based charge module conduction interference test scheme is designed, and a detailed result processing method is given. Based on the test scheme, the conducting interference test of the charging module is completed, and the common mode interference is obtained by using the three phase common mode and differential mode scalar separation method. With the differential mode interference spectrum, the interference exceeding the standard and the rectification direction of the electromagnetic compatibility are determined by comparison with the standard limit. Then, the improved design of the three-phase EMI filter is carried out. Based on the insertion loss simulation analysis method of the three-phase EMI filter, the three-phase EMI filter of the charging module working under the condition of large current is improved. Based on the impedance amplitude frequency curve provided by the filter capacitor manufacturer, the high frequency equivalent circuit is set up. The impedance analyzer is used to test the common mode inductance, the leakage inductance of the common mode inductor and the impedance amplitude frequency curve of the differential mode inductor. The corresponding high frequency equivalent circuit is set up. The parasitic parameters of the printed board are extracted by the electromagnetic analysis software, and the EMI filtering is based on the CISPR 17. The insertion loss test circuit is set up, and its common mode and differential model simulation model is set up to analyze the insertion loss. Based on the simulation results and the test results of the charge module conduction interference, the EMI filter is improved. The improved filter and the charging module using the filter are tested and verified. Finally, a study is made. The simulation and analysis method of charge module conduction interference adapted to complex control mode and topology is introduced, and the insertion loss of EMI filter in the charging module is analyzed. In the system simulation software, the charging module including EMI filter, confluence discharge equivalent circuit model, IGBT circuit model, transformer high frequency equivalent circuit model and so on is set up. The model of interfering circuit is analyzed and its control algorithm model is established in Simulink. Through joint modeling, the simulation model of conducting interference of charging module is obtained. The influence of EMC key elements or parameters on the conduction interference of the charging module is simulated and analyzed. The insertion loss of the three-phase EMI filter in the charging module is compared with the insertion loss obtained from the separate modeling filter. The joint modeling provides a reference method to simulate the effect of some EMC design or parameters on the conducting interference of the charging module at the design stage.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN713

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