铜线电阻的计算方法.pdf

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1、铜线的电阻铜线的电阻可以根据公式电阻=电阻率乘以长度/横截面积，只要从相关资料上查到铜导线的电阻率就可以算出电阻值了！铜的电阻率在20和100摄氏度的时候，电阻率分别在0.0175和0.0228。铜线的质量=密度乘以体积（体积=横截面积乘以长度，铜的密度8.9g/cm3）长度为l的铜线电阻R的计算公式如下:其中R是导体电阻，单位：欧姆l是导体长度，单位：米ρ是导体电阻率(又称比电阻)A是截面积,单位：平方毫米π是常数d是线材标称直径，单位：毫米电阻率ρ电阻率（又称比电阻）是衡量导体对电流阻碍作用强弱的物理量。电阻率越低，电荷越容易通过导体。铜线的电阻率跟温度有关系。电阻温

2、度系数线材电阻取决于所处的环境温度，电阻和温度的关系可用电阻温度系数α来表示。在温度T时，线圈电阻或线材电阻的计算公式如下：其中α是电阻温度系数RT是温度T时的线圈或线材电阻R20是温度20°C时的线圈或线材电阻单位长度（1米）铜线电阻查询表电阻电阻的极限是根据IEC317-0-1标准附录C.1铜线的“线性电阴的计算机方法”计算出来的。公称直美国最小值公称最大值公称直美国最小值公称最大值径[mm]线标[Ω/m][Ω/m][Ω/m]径[mm]线标[Ω/m][Ω/m][Ω/m]0.009858.0204.00226.60249.300.043010.630011.77012.

3、91000.0101192.00213.40234.700.043710.290011.40012.50000.010957.0164.90183.20201.500.044045.010.150011.24012.33000.0113153.40170.50187.500.04509.705010.75011.79000.0120136.00151.10166.300.04609.360010.29011.21000.012556.0125.40139.30153.200.047044.58.96609.85310.74000.013055.5115.90128.801

4、41.700.04808.59609.44710.30000.013555.0107.50119.40131.400.04908.24909.0659.88100.014099.94111.00122.100.050044.07.92208.7069.48900.014554.593.17103.50113.900.052043.57.32507.0498.77400.015554.081.531.5399.650.05307.05107.7488.44600.016076.5285.0293.520.055043.06.54707.1957.84300.016553.5

5、71.9579.9487.940.05606.31606.9407.56500.017067.7875.3182.840.05805.95206.4706.98800.017553.063.9871.0778.180.060042.55.56206.04606.52900.018060.4667.1873.890.06205.20905.66206.11500.018552.557.2363.5969.950.063042.05.04505.48405.92200.019054.2660.2966.320.065041.54.66705.15105.71100.01955

6、2.051.5157.2462.960.06704.40404.84805.35900.020048.9754.4159.850.06804.28104.70705.19600.021051.544.4249.3554.290.070041.04.05004.44204.89000.021542.3847.0851.790.07103.94104.31804.74700.022051.040.4744.9749.470.07403.64003.97504.35500.023050.537.0341.1445.260.07504.13.54703.86904.23500.0

7、24034.0137.7941.560.078040.03.28903.57703.90300.024550.032.6336.2639.890.08003.13303.40103.70300.025031.3434.8238.310.083039.52.91803.15904.43000.026049.528.9832.2035.420.08502.78703.01203.26500.027026.8729.8632.840.088039.02.60602.81103.03800.027549.025.9028.7831.6