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机构地区:[1]桂林电子科技大学机电工程学院,广西桂林541004
出 处:《电子质量》2009年第11期71-73,78,共4页Electronics Quality
基 金:广西自然科学基金项目(桂科自0832242);广西制造系统与先进制造技术重点实验室主任课题(桂科能0842006_016_Z);广西研究生教育创新计划资助项目(2009105950802M05)
摘 要:电子设备中线缆所处工作环境越来越复杂,线缆之间的电磁串扰以及电磁损耗带来的热效应日益严重。针对这一问题,在电磁场、温度场和多场耦合相关理论的基础上,具体分析了线缆的电磁场和温度场相互影响的显著程度,基于在温度变化较小的情况下线缆的材料属性变化不明显,为了简化研究手段,只关注了从电磁场到温度场的单方向耦合。建立了线缆电磁-热耦合三维有限元仿真分析模型,采用Ansoft HFSS进行电磁场分析,同时将其分析所得电磁损耗作为发热源加载到Ansofte Physics中进行温度场分析。采用这种协同仿真方案,最终得到了不同线缆间距、绝缘层厚度和传输信号频率对电磁串扰及热效应带来的影响。Since the work environment of cables in electronic equipment is becoming more and more complex, the electromagnetic crosstalk between cables and the thermal effect caused by electromagnetic loss are becoming seriously, To solve this problem, the degree of mutual influence between electromagnetic field and temperature field of cables is analyzed in particular based on the theory of electromagnetic field, temperature field and multi-field coupling. As the change of cables' material properties is not significant under the condition of small temperature change, only one-way coupling from electromagnetic field to temperature field is concerned for simplification. After three-dimensional finite element simulation analysis models are built, electromagnetic field analysis is simulated with Ansoft HFSS and its electromagnetic loss is loaded into Ansoft ePhysics as the source of heat to simulate and analyze temperature field. At last, the influence of the distance between cables, insulating layer thickness and transmission signal frequency on electromagnetic crosstalk and the thermal effect are analyzed with collaborative simulation method.
分 类 号:TN03[电子电信—物理电子学]
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