1) common mode interference
共模干扰
1.
This paper introduces the generaing mechanism of electromagnetic interference,how to diagnose the common mode interference and difference mode interference from interference source and frequency,and take effective measures to control the interference.
详细介绍了电磁干扰产生的机理 ,以及从干扰源和频率上如何诊断共模干扰、差模干扰 ,并采用有效的措施进行抑
2.
A simple and reliable method to solve the false "current leakage" is described from the angle of controlling the common mode interference.
分析了现有铁路客车DC600 V供电系统漏电流产生的原因,并从抑制共模干扰的角度出发,介绍了一种简单可靠的解决假"漏电"问题的方法。
3.
Emphasis is placed on the differential mode filtering principle and application of differential mode filter capacitors and the common mode interference concept and application of common mode filter capacitors.
介绍了容性滤波的原理,并以工程实际事例说明容性滤波的应用,着重说明了差模滤波的原理及差模滤波电容器的应用及共模干扰的概念及共模滤波电容器的应用。
2) common-mode interference
共模干扰
1.
Methods Structure of the ECG instrument and mechanism of common-mode interference were analyzed, and the miniature low power consumption ECG measuring circuit was designed using microprocessor, instrumentation amplifier, operational amplifier and RS-232 transceiver.
方法分析心电测量仪器的结构及产生共模干扰的机理,使用微处理器、仪表放大器、运算放大器、RS-232收发器设计微型低功耗的心电测量电路,用PDA为测量电路供电,接收数据并运算、存储和显示。
2.
The common-mode interference in the application of instrumentation amplifier which is not because of grounding is analysed,and some feasible methods on improving the common-mode rejection performance of measuring circuit are given.
分析了对测量放大器应用中共模干扰产生的原因,给出了提高测量放大器共模抑制能力可以采取的实用方法。
3.
Which mainly includes Common-Mode interference and Differential-Mode interference .
电磁兼容(EMC)问题越来越受到人们的重视,而解决电磁兼容问题的实质则是如何抑制电磁干扰(EMI),电磁干扰主要分为共模干扰和差模干扰。
3) common mode noise
共模干扰
1.
Three methods to diagnose differential mode and common mode noise are discussed in this paper, the comparsion of these methods also be pre- sented.
诊断开关电源传导干扰的主要性质,分别测量共模干扰和差模干扰,是正确设计电源EMI滤波器的第一步。
4) Common mode disturbance
共模干扰
1.
It is concluded through analysis that the influence of common mode disturbance caused by unsuitable interface design between DCS and the control instruments was the main reason.
经过查找分析 ,其主要原因是DCS通道与同操器等仪表的接口设计不当而引入共模干扰所致 ,最后通过减小共模干扰幅值的方法解决了该问题。
5) The common mode interference
共模(CM)干扰
6) CM and DM interference
共模及差模干扰
补充资料:共模干扰
共模干扰
common mode interference
gongmo gonroo共模干扰(eommon mede interferenee)出现在电路往、返引线与规定参考点(通常是地或机壳)之间的电磁干扰。它使整个电路对参考点的电位一起升高,如图1中的。二。产生共模干扰的原因很多,例如雷电流、短路电流或其他放电电流等通过接地极时引起的地电位升高和接地引线阻抗上的电压降,外界电场对往、返引线的电场报合,外界磁场藕合(见感应辐合)或辐射辐合引起的地环干扰(见抗干扰接地)等。 图l共模干扰e.一裸电动势,L:LZ一往、返引线. Z一受端阻抗;鲡一共模干扰 共模干扰ecm在电路中不直接形成与源电动势(有用信号)。,相申联的干扰电压,但较强的共模干扰有可能使电路对地绝缘承受较高的电压而导致闪络或击穿,造成所谓的“反击”事故。 共模干扰在某土门日日日日日些情况下可全部或部分转换为差模干扰,需预加防范。图2为共模转换典型电路,共模干扰ecm可在电路的往、返引线Ll和L:中驱动方向相同的共模电流icmJ和编:。若电路阻抗完全对称,则这对共模电流相等。此时受端阻抗上两端的对地电压。,和ueZ相等,而不呈现干扰电压。若电路阻抗不对称,则这对共模电流不相等,它们在引线阻抗ZL,和ZLZ上形成不同的电压降。此时往返引线受端对地电压之差“d,一ue,一ueZ便成为受端阻抗Z两端之间的干扰电压,称作共模转换的差模干扰。 为抑制共模转换的差模干扰,可采取如下措施:①抑制差模干扰本身的多种措施;②减小共模干扰:降低接地电阻,缩短接地引线,减小地环面积等;③增加地环阻抗.以限制共模电流:采用一点接地方式、共模干扰抑制器等;④加强共模电流的分流:采用多点接地方 图2共模转换 es一源电动势;ee。一共模干扰;ZL,、ZLZ一引 线阻抗;Z一受端阻抗;C,l、C.2一对地电容; 左m一、儿mZ一共模电流;价,、ueZ一对地电压; udm一干扰电压式等;⑤均衡各接地点的电位:敷设金属板接地回路或大面积接地网等;⑥减小电缆的转移阻抗:采用双屏蔽电缆,把单屏蔽电缆穿金属管等;⑦电路对称化技术:采用双纹线,平衡电缆接线,差动放大器等;⑧隔离共模干扰:采用隔离变压器、光藕合器或光缆等。
说明:补充资料仅用于学习参考,请勿用于其它任何用途。
参考词条