【2017年整理】电子元件的识别与检测.ppt

涤纶薄膜电容 耐压：400V 容量：33X104μF 误差：J为±5％ 表示容量为33X104μF 误差为±5％ 耐压为400V 涤纶薄膜电容器 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 耐压为“2A”＝1.0×102=100V 容量为“104”＝10×104pF 误差为“J”＝ ±5％ 涤纶薄膜电容器 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 涤纶电容器耐压的标注是采用一个数字和一个字母组合而成。数字表示10的幂指数，字母表示数值，单位是V（伏）。 字母=数值 A=1.0 B=1.25 C=1.6 D=2.0 E=2.5 F=3.15 G=4.0 H=5.0 J=6.3 K=8.0 Z=9.0 例如： 2A代表 1.0*100=100V 1J代表 6.3*10=63V 2G代表 4.0*100=400V 1K代表 8.0*10=80V Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 例3——数字表示法 CL ——涤纶薄膜电容 容量为47n=47 ×103pF 误差为J＝ ±5％ 耐压为63V Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 三、识别电感器 电感器实物及图形符号 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 电感器的单位及符号 电感器用L表示，单位为亨利，符号为H。 常用单位还有毫亨（mH）、微亨（μH），换算关系：1H＝103mH=106μH。 容量 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 任务3 认识二极管 一、常用二极管实物及图形符号 常用二极管实物展示 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 二极管图形符号： 文字符号：VD 箭头方向表示二极管正向导通时电流的方向 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 实物外形正负电极的识别 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 二、二极管的导电特性实验 观察二极管和导电特性 1. VD正接时 电路原理图 VD正接时实物示意图 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 2. VD反接时 电路原理图 VD反接时实物示意图 为 何 不 亮 ？？？ Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty L