推荐回答(5个)
铜线的电阻率ρ=0.0172,铝线ρ=0.0283,导线电阻计算公式:
R=ρ×L/S
(L=导线长度,单位:米,S=导线截面,单位:mm^2)
电流主要是沿着导线表面铜包铝线通过的,称集肤效应,频率越高越明显,铜包铝线就是利用这个特点而相对节约材料。但其电阻率比纯铜线略高,铜包的厚度不同其电阻率也不同。
聚酯及改性聚酯的漆包线,普通聚酯漆包线热级为130,经改性后漆包线热级为155级。该产品机械强度高,并具有良好的弹性、附着性、电气性能和耐溶剂性能,弱点是耐热冲击性能差,耐潮性能较低。

扩展资料:
电阻器在额定温度(最高环境温度)tR下连续工作所允许耗散的最大功率。对每种电阻器同时还规定最高工作电压,即当阻值较高时即使并未达到额定功率,也不能超过最高工作电压使用。
薄膜电阻体的厚度d很小,难于测准,且ρ又随厚度而变化,故把视为与薄膜材料有关的常数,称为膜电阻。实际上它就是正方形薄膜的阻值。
产生导体尺寸不合格的原因除半成品导体有隐性缺陷或规格不均匀外,主要是涂漆过程放线张力,各部分毛毡夹松紧度调整不当,或放线和导轮转动不灵活,把线拉细。
漆膜绝缘尺寸不合格主要是毛毡松紧调整不合适,或配模不当及模具没有装好。另外,工艺速度、漆的粘度、固体含量等的变化也会影响漆膜厚度。
参考资料来源:百度百科--漆包线
参考资料来源:百度百科--电阻器
铜线的电阻率ρ=0.0172,铝线ρ=0.0283,导线电阻计算公式:
R=ρ×L/S
(L=导线长度,单位:米,S=导线截面,单位:m㎡)
电流主要是沿着导线表面铜包铝线通过的,称集肤效应,频率越高越明显,铜包铝线就是利用这个特点而相对节约材料。但其电阻率比纯铜线略高,铜包的厚度不同其电阻率也不同。
1、导线电阻计算公式:
R=ρ×L/S
式中:ρ--电阻率
铜线ρ=0.0172,
L---导线长度
米,本题L=1,
S=导线截面
m㎡
,Φ--直径mm
,Π=3.14
,
S=(Φ/2)^2*Π
=Φ^2/4*3.14=0.25*3.14*Φ^2=0.785*Φ^2
,
2、铜漆包线每米电阻:
R=ρ×L/S=0.0172*1/(0.785*Φ^2
)=0.0219/Φ^2
欧姆
3、例如:当铜漆包线线直径
Φ=1mm时:
R=0.0219/Φ^2
=0.0219欧姆
4、例如:当铜漆包线线直径
Φ=0.1mm时:
R=0.0219/Φ^2
=2.19欧姆
5、R的大小取决于:铜线的线质纯度、线径尺寸均匀度、线径误差。
所以,计算会有误差。
AWG 外径 截面积
(mm2) 电阻值
(/km)
公制mm 英制inch
4/0 11.68 0.46 107.22 0.17
3/0 10.40 0.4096 85.01 0.21
2/0 9.27 0.3648 67.43 0.26
1/0 8.25 0.3249 53.49 0.33
1 7.35 0.2893 42.41 0.42
2 6.54 0.2576 33.62 0.53
3 5.83 0.2294 26.67 0.66
4 5.19 0.2043 21.15 0.84
5 4.62 0.1819 16.77 1.06
6 4.11 0.1620 13.30 1.33
7 3.67 0.1443 10.55 1.68
8 3.26 0.1285 8.37 2.11
9 2.91 0.1144 6.63 2.67
10 2.59 0.1019 5.26 3.36
11 2.30 0.0907 4.17 4.24
12 2.05 0.0808 3.332 5.31
13 1.82 0.0720 2.627 6.69
14 1.63 0.0641 2.075 8.45
15 1.45 0.0571 1.646 10.6
16 1.29 0.0508 1.318 13.5
17 1.15 0.0453 1.026 16.3
18 1.02 0.0403 0.8107 21.4
19 0.912 0.0359 0.5667 26.9
20 0.813 0.0320 0.5189 33.9
21 0.724 0.0285 0.4116 42.7
22 0.643 0.0253 0.3247 54.3
23 0.574 0.0226 0.2588 48.5
24 0.511 0.0201 0.2047 89.4
25 0.44 0.0179 0.1624 79.6
26 0.404 0.0159 0.1281 143
27 0.361 0.0142 0.1021 128
28 0.32 0.0126 0.0804 227
29 0.287 0.0113 0.0647 289
30 0.254 0.0100 0.0507 361
31 0.226 0.0089 0.0401 321
32 0.203 0.0080 0.0316 583
33 0.18 0.0071 0.0255 944
34 0.16 0.0063 0.0201 956
35 0.142 0.0056 0.0169 1,200
36 0.127 0.0050 0.0127 1,530
37 0.114 0.0045 0.0098 1,377
38 0.102 0.0040 0.0081 2,400
39 0.089 0.0035 0.0062 2,100
40 0.079 0.0031 0.0049 4,080
41 0.071 0.0028 0.0040 3,685
42 0.064 0.0025 0.0032 6,300
43 0.056 0.0022 0.0025 5,544
44 0.051 0.0020 0.0020 10,200
45 0.046 0.0018 0.0016 9,180
46 0.041 0.0016 0.0013 16,300
漆包线电阻对照表 ,第41项是你要的0.07线径,每公里3685欧姆
原发布者:cxxthf
r*S10000导体标准电阻率r导体电阻()00*1000*4(%)*d2*(*mm2/m)S导体截面积(mm2)d导体直径(mm)导电率(%)1.导体电阻计算方法:绞线引起的电阻增大系数绞合根数截面系数单根导体直径相对导电率20℃标准软铜电阻率最大直流电阻kncdfρ0ohm/m=1.02190.970.194%0.0172410.1292
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