摘要
针对在许多工程电磁屏蔽设计中存在的不足,如:只在意诸如信号电缆的被动屏蔽,而忽视诸如电力电缆、射频电缆的主动屏蔽;欠考虑双绞线绞距的选择;欠考虑同轴电缆的截止频率的选择;在汇线槽、电缆沟等电缆集中处对电缆的间距没有统一的规定;忽视电缆屏蔽层(或穿管金属)两端接地时的地电位差的影响。通过实例对此进行分析并提出解决方案。
In view of the shortcomings in the design of electromagnetic shielding in many projects,for example only pay attention to the passive shielding,such as signal cable,but ignore the initiative shielding such as power cable and RF cable.The choice of twisted pair pitch is under-considered.The selection of cut-off frequency of coaxial cable is under-considered.There is no uniform regulation on the distance between cables in the cable concentration places,such as cable trough and cable trench.The influence of the ground potential difference between the two ends of the cable shield(or through the metal tube)is ignored.The solution is proposed through case discussion.
作者
杨继华
徐义亨
Yang Jihua;Xu Yiheng(Zhejiang Supcon Technology Co.Ltd.,Hangzhou,310012,China)
出处
《石油化工自动化》
CAS
2021年第S01期150-153,共4页
Automation in Petro-chemical Industry
关键词
电感性耦合
互感
电磁屏蔽
地电位差
inductive coupling
mutual inductance
electromagnetic shielding
ground potential difference
作者简介
杨继华(1981-),男,浙江临海人,现就职于浙江中控技术股份有限公司,主要从事控制系统的设计和应用、智能制造业务的研究和推广,任副总工程师,高级工程师。
