第22卷第12期 2014年12月
文章编号1004-924X(2014)12-3160-07
光学精密工程
Optics and Precision Engineering
Vol. 22No.12
Dec. 2014
瞬变电磁场辐照下液晶显示模块的电磁兼容预测
孙守红1.2，郭立红1*，葛欣宏1
（1.中国科学院长春光学精密机械与物理研究所，吉林长春130033;2.中国科学院大学，北京100049）摘要：由于大功率TEACO激光器系统中的液晶显示模块易于耦合电磁干扰，从而影响激光器的正常工作，本文研究了在瞬变电磁场辐照下预测液晶显示模块电磁兼容(EMC)能力的方法。分析了液晶显示模块集成于激光器系统时受干扰耦合的机理；从场线耦合干扰的角度，采用Taylor形式的BLT方程对液晶显示模块耦合的场线电磁干扰进行了分析计算，并采用实验手段对预测结果进行了验证。计算结果显示；连接线缆耦合电磁场在液晶显示模块数据线上产生的干扰电压为1V，超出了电路的噪声容限，需要采取EMC控制措施保证液晶显示模块的工作性能。验证实验结果表明：得到的EMC预测的结果能够正确反映液晶显示模块的实际EMC性能。该方法对大功率TEACO：激光器电磁辐射近场区内电气设备的电磁兼容预测与设计具有指导意义。
关
词：液晶显示模块；电雅兼容；TEACO：激光器；瞬变电醛场；场线耦合
中图分类号：TN248.2;TN141.9
文献标识码：A
doi:10.3788/OPE.20142212.3160
EMC prediction of liquid crystal display module under
transient irradiation in electromagnetic field
SUN Shou-hong'·,GUO Li-hong',GE Xin-hong
(1.ChangchunInstituteof Optics，FineMechanics and Physics ChineseAcademy of Sciences,Changchun130033,China;
2.University of ChineseAcademyof Sciences,Beijing100049,China)
*Correspondingauthor,E-mail:guolh@ciomp.ac.cn
Abstract: The Liquid Crystal Display(LCD) module in a high power TEA CO, laser is easy to couple with electromagnetic interference, so as to affect the normal work of the laser. Therefore, this paper explores the prediction method of Electromagnetic Compatibility (EMC) for the LCD module under transient irradiation in an electromagnetic field. The coupling mechanism of electromagnetic interfer-ence received by the LCD module integrated in the laser system was analyzed. On the basis of the cou pling of field and line, the field line electromagnetic interference of the LCD module was analyzed and calculated by using the BLT equation in the Taylor form, then, the prediction results were verified by several experimentally. The experimental results show that the interference voltage produced by con nect cables coupled with electromagnetic fields on the data lines of LCD display module is 1 V, and ex ceeds the noise margin of the circuit. So the EMC control measures must be taken to ensure the per
收稿日期：2013-11-05；修订日期：2014-01-04
基金项目：吉林省科技厅科技发展计划资助项目（No.20120331）