基于蒙特卡罗法的航空高压电源模块研究

发布时间：2018-08-21 14:20

【摘要】：目前国内航空电源系统主要采用低压28V直流电源供电,近年来国外航空飞机逐渐采用270V高压直流电源(HVDC)供电代替了低压直流电源供电。航空高压电源系统具有电能传输效率高、重量轻等优势,因此已逐渐成为航空电源系统的主流发展趋势。其中二次电源直接面向机载用电设备,其性能影响整个航空电源系统品质,而当前国内有关航空270V高压直流电源二次转换技术研究不多。本论文以航空高压直流电源系统中二次电源DC/DC变换器作为研究对象,针对二次电源高功率密度、高可靠性等要求,设计了二次电源DC/DC变换器。主要内容为:1.探讨了航空电源系统的发展过程,分析了高压直流电源系统的优势及其二次电源中DC/DC变换器的发展趋势,深入研究了蒙特卡罗法及其在电力电子场合中的应用。2.设计了二次电源DC/DC变换器电路。首先,对非隔离型和隔离型DC/DC变换器基本拓扑进行了对比分析,确定了单端正激式拓扑为主电路结构,然后对主电路进行了设计。其次,对变换器的控制电路和反馈电路进行了设计。最后,设计了限流保护、过压保护等保护电路,进一步提高变换器的性能。3.采用了蒙特卡罗方法分析该DC/DC变换器。首先,给出了蒙特卡罗法分析流程,并在Saber仿真软件中建立了变换器的仿真电路。其次,对变换器电路进行了蒙特卡罗法分析。最后,给出了蒙特卡罗法分析结果。利用蒙特卡罗法优化器件参数,提高变换器的可靠性。4.结合电路设计和蒙特卡罗法器件优化完成了DC/DC变换器模块制作。制作了一台200V-400V输入,28V/300W输出,体积半砖左右,效率不小于88%,高功率密度的电源模块。给出了实验波形和效率曲线图,实验结果证明了基于蒙特卡罗法的二次电源DC/DC变换器的优化方案可行,各项性能达到了设计要求。
[Abstract]:At present, the domestic aviation power supply system mainly uses the low voltage 28V DC power supply, in recent years the foreign aviation plane gradually uses 270V high voltage DC power (HVDC) power supply to replace the low voltage DC power supply. Aviation high voltage power supply system has the advantages of high power transmission efficiency, light weight and so on, so it has gradually become the mainstream development trend of aviation power supply system. The secondary power supply is directly oriented to the airborne power equipment, and its performance affects the quality of the whole aviation power supply system. However, there are few researches on the secondary conversion technology of the 270V HVDC power supply in China. In this paper, the secondary power DC/DC converter in the aeronautical HVDC power supply system is taken as the research object. According to the requirements of high power density and high reliability of the secondary power supply, a secondary power DC/DC converter is designed. The main content is: 1. The development process of aeronautical power supply system is discussed. The advantages of HVDC power supply system and the development trend of DC/DC converter in secondary power supply are analyzed. The Monte Carlo method and its application in power electronic applications. The DC/DC converter circuit of secondary power supply is designed. Firstly, the basic topologies of non-isolated and isolated DC/DC converters are compared and analyzed, and the main circuit structure of single-terminal forward topology is determined, and then the main circuit is designed. Secondly, the control circuit and feedback circuit of the converter are designed. Finally, the current limiting protection, overvoltage protection and other protection circuits are designed to further improve the performance of the converter. Monte Carlo method is used to analyze the DC/DC converter. First, the Monte Carlo analysis flow is given, and the simulation circuit of the converter is established in the Saber simulation software. Secondly, the converter circuit is analyzed by Monte Carlo method. Finally, the results of Monte Carlo analysis are given. Monte Carlo method is used to optimize the device parameters to improve the reliability of the converter. Combined with circuit design and Monte Carlo device optimization, the DC/DC converter module is fabricated. A 200V-400V input 28V / 300W output module with a volume of about half brick and an efficiency of no less than 88 is made, which has a high power density. The experimental waveforms and efficiency curves are given. The experimental results show that the optimization scheme of the secondary power DC/DC converter based on Monte Carlo method is feasible, and the performance of the converter meets the design requirements.
【学位授予单位】：西京学院
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：V242

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