基于电磁兼容的机箱结构设计研究
发布时间：2018-12-23 08:41
【摘要】：现代电子设备对可靠性要求越来越高，尤其是对电磁兼容性提出了很高的要求。如何设计处结构合理，屏蔽效能良好的机箱是本课题追求的目标。针对机箱的工作环境以及有关机箱的设计要求，对此机箱进行了电磁兼容设计。 本论文采取理论和试验相结合的方式，从机箱的屏蔽效能出发，分析箱体材料、箱体缝隙对屏蔽效能的影响，以及电源线上滤波器的使用，，对整个箱体电磁兼容兼容性的影响，提出了一系列预防措施，具体包括以下几点：（1）屏蔽材料的选择：材料选择的合适与否直接影响屏蔽体的屏蔽效果的好坏。通过对金属材料的屏蔽原理进行分析，了解了材料的屏蔽效能的组成，根据机箱的结构和成本要求，选择合适的材料作为屏蔽体，并计算其屏蔽效能是否符合要求。（2）箱体缝隙的屏蔽：实际工程中的屏蔽体都带有孔缝，直接影响屏蔽性能的完整性，本文结合导电衬垫的屏蔽效能的分析，了解到在箱体缝隙处使用导电衬垫可以提高整个箱体的屏蔽性能。（3）电源干扰：对机箱来说，穿入箱体内部的电源线是一个很大的干扰源，可以采用对箱内的电源引线的穿入处使用电源滤波器并进行单独屏蔽。（4）为了能直观的了解对机箱的电磁兼容性设计，对箱体进行了UG实体建模，从模型图中可以了解到电磁泄漏位置以及在生产中应采取何种措施解决问题。（5）参照电子设备的相关屏蔽效能的要求和测试方法对箱体进行相关电磁兼容性的测试分析，用以验证本论文的对机箱进行电磁兼容性结构设计是否合理。
[Abstract]:Modern electronic equipments require more and more high reliability, especially electromagnetic compatibility (EMC). How to design a reasonable structure, shielding efficiency of the chassis is the goal pursued by this subject. According to the working environment of the chassis and the design requirements of the chassis, the electromagnetic compatibility design of the chassis is carried out. In this paper, by combining theory and experiment, we analyze the influence of box material, box gap on shielding efficiency, and the use of filter on power line, and the influence of the whole box body electromagnetic compatibility. A series of preventive measures are put forward, including the following: (1) the selection of shielding material: whether the material is suitable or not directly affects the shielding effect of the shield. Through the analysis of the shielding principle of metal materials, the composition of shielding effectiveness of materials is understood. According to the structure and cost requirements of the chassis, the appropriate materials are selected as the shielding body. And calculate whether the shielding effectiveness meets the requirements. (2) the shielding of the slot in the box: in the actual engineering, the shield has holes, which directly affects the integrity of the shielding performance, this paper combined with the analysis of the shielding effectiveness of the conductive gasket, It has been learned that the use of conductive gaskets in the slot of the box can improve the shielding performance of the whole box. (3) Power interference: for the chassis, the power cord penetrating the inside of the box is a great source of interference. The power filter can be used to penetrate the power lead in the box and be shielded separately. (4) in order to understand the electromagnetic compatibility design of the chassis directly, the UG solid model of the box is built. From the model diagram, the location of electromagnetic leakage and what measures should be taken to solve the problem can be found. (5) according to the requirements and test methods of shielding effectiveness of electronic equipment, the relevant electromagnetic compatibility of the box is tested and analyzed. It is used to verify whether the EMC structure design of this paper is reasonable.
【学位授予单位】：西安工程大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH122
本文编号：2389715
[Abstract]:Modern electronic equipments require more and more high reliability, especially electromagnetic compatibility (EMC). How to design a reasonable structure, shielding efficiency of the chassis is the goal pursued by this subject. According to the working environment of the chassis and the design requirements of the chassis, the electromagnetic compatibility design of the chassis is carried out. In this paper, by combining theory and experiment, we analyze the influence of box material, box gap on shielding efficiency, and the use of filter on power line, and the influence of the whole box body electromagnetic compatibility. A series of preventive measures are put forward, including the following: (1) the selection of shielding material: whether the material is suitable or not directly affects the shielding effect of the shield. Through the analysis of the shielding principle of metal materials, the composition of shielding effectiveness of materials is understood. According to the structure and cost requirements of the chassis, the appropriate materials are selected as the shielding body. And calculate whether the shielding effectiveness meets the requirements. (2) the shielding of the slot in the box: in the actual engineering, the shield has holes, which directly affects the integrity of the shielding performance, this paper combined with the analysis of the shielding effectiveness of the conductive gasket, It has been learned that the use of conductive gaskets in the slot of the box can improve the shielding performance of the whole box. (3) Power interference: for the chassis, the power cord penetrating the inside of the box is a great source of interference. The power filter can be used to penetrate the power lead in the box and be shielded separately. (4) in order to understand the electromagnetic compatibility design of the chassis directly, the UG solid model of the box is built. From the model diagram, the location of electromagnetic leakage and what measures should be taken to solve the problem can be found. (5) according to the requirements and test methods of shielding effectiveness of electronic equipment, the relevant electromagnetic compatibility of the box is tested and analyzed. It is used to verify whether the EMC structure design of this paper is reasonable.
【学位授予单位】：西安工程大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH122
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