《電阻器基礎(chǔ)知識(一)》由會員上傳分享，免費在線閱讀，更多相關(guān)內(nèi)容在工程資料-天天文庫。

1、電阻器基礎(chǔ)知識(-)1?分類與表示(Resistor)通常電阻器是電子電路中使用最為廣泛的電子元器件，電阻器被稱為電阻，用字母R表少。普通電阻器稱密電肝器熔斷電爼器網(wǎng)絡(luò)電阻器通用電阻器可變電阻器敏感電阻器通用電阻器在電路圖中通用符號如下:通常使用的電子電路中額定功率比較小，電阻器常用的是1/8W或1/16W的，通常不會標(biāo)出它的額定功率，當(dāng)在額定功率比較大時就需要把額定功率標(biāo)出來。下圖為常用的電阻器功率表示方法：R1WR2WR3WR4W—IIVi—R5WR10W—ixi—2?電阻器的主要參數(shù)(1)電阻器標(biāo)稱阻值我國電阻器和電

2、容系采用E系列標(biāo)準(zhǔn)。E系列由國際電工委員會(IEC)與1952年發(fā)布為國際標(biāo)準(zhǔn)。電阻的標(biāo)稱阻值為E6、E12、E24、E4&E96、E192這6個系列，分別適用于允許偏差為20%、10%、5%、2%、1%、0.5%等。E24為常用系列，E48、E96、E192為高精密電阻系列。具體標(biāo)稱阻值如下：E12(±10%)101215182227333947566882E12(±10%)1012I15I1822I27I33I39

3、47566882E6(±20%)101522334768E24(±2%、±5%、±10%)1011121

4、31516182022242730333639434751566268758291E48(±2%)1.001.051.101.151.211.271.331.401.471.541.621.691.781.871.962.052.152.262.372.492.612.742.873.013.163.323.483.653.834.024.224.424.644.875.115.365.625.906.196.496.817.157.507.878.258.669.099.53E96(±1%)10.010.210.510.

5、711.011.311.511.812.112.412.713.013.313.714.014.314.715.015.415.816.216.516.917.417.818.218.719.119.620.020.521.021.522.122.623.223.724.324.925.526.126.727.428.028.729.430.130.931.632.433.234.034.835.736.537.438.339.240.241.242.243.244.245.346.447.548.749.951.152.

6、353.654.956.257.659.060.461.963.464.966.568.169.871.573.275.076.878.780.682.584.586.688.790.993.195.397.6E192(±0.1%、±0.25%、±0.5%)10.010.110.210.410.510.610.710.911.011.111.311.411.511.711.812.012.112.312.412.612.712.913.013.213.313.513.713.814.014.214.314.514.714.

7、915.015.215.415.615.816.016.216.416.516.716.917.217.417.617.818.018.218.418?718.919.119.319.619.820.020.320.520.821.021.321.521.822.122.322.622.923.223.423.724.024.324.624.925.225.525.826.126.426.727.127.427.728.028.42&729.129.429.830.130.530.931.231.632.032.432.8

8、33.233.634.034.434.835.235.736.136.537.037.437.93&338.839.239.740.240.741.241.742.242.743.243.744.244.845.345.946.447.047.54&14&749.349.950.551.151.752.353.053.654.254.955.656.256.957.65&359.059.760.461.261.962.663.464.264.965.766.567.368.169.069.870.671.572.373.2

9、74.175.075.976.877.778.779.680.681.682.583.584.585.686.687.68&789.890.992.093.194.295.396.597.698.8將這些系列中的系數(shù)乘以i（r（n為整數(shù)），即為電阻器的具體阻值。(1)電阻器誤差電阻器在生產(chǎn)中由于技術(shù)和成