CAJ | 학술논문

电子、电气产品的设计，必须保证在一定的电磁环境中能正常工作，既满足标准规定的抗干扰极限值要求。在受到一定的电磁干扰时，无性能降级或故障；又要满足标准规定的电磁辐射极限值的要求，对电磁环境不构成污染。所以，产品设计之初，就要从分析产品预期的电磁环境、干扰源、耦合途径和敏感部件入手，采用相应的技术措施．抑制干扰源、切断或削弱耦合途径，增强敏感部件的抗干扰能力等。文中详细介绍了一款485通讯隔离产品从辐射超标到顺利通过FCCCLASSB认证，在原理设计、PCB制板等多方面所做的各项改进措施。文中所提到的方法及规则．对产品EMC设计具有很大的参考及指导意义。
전자、전기산품적설계，필수보증재일정적전자배경중능정상공작，기만족표준규정적항간우겁한치요구。재수도일정적전자간우시，무성능강급혹고장；우요만족표준규정적전자복사겁한치적요구，대전자배경불구성오염。소이，산품설계지초，취요종분석산품예기적전자배경、간우원、우합도경화민감부건입수，채용상응적기술조시．억제간우원、절단혹삭약우합도경，증강민감부건적항간우능력등。문중상세개소료일관485통신격리산품종복사초표도순리통과FCCCLASSB인증，재원리설계、PCB제판등다방면소주적각항개진조시。문중소제도적방법급규칙．대산품EMC설계구유흔대적삼고급지도의의。
At the beginning of the product design, it is necessary to start from analyzing the electromagnetic environment, source of interference coupling path and sensitive components. And then apply appropriate technical measures to curb the sources of interference, to cut or weaken the coupling path, and enhance the anti-interference ability of the sensitive components. This paper describes how a communication isolated product passed FCC CLASS B certification. Mentioned methods and rules about the schematic and PCB have great reference and guidance.