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电热管电阻值范围计算

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电热管|加热管|铜加热管|钛加热管|选购

电热管|加热管|铜加热管|钛加热管|选购

加热管的设计、生产过程中,加热管的电阻值大小,决定了加热器的功率支,国标明确规定,电热管功率误差范围及电热管电阻值误差范围,下面文章我将举例介绍如何计算1支铝质加热管的电阻范围值,在什么电阻范围内的加热管才符合相关标准。

1:拿到客户的图纸,理解客户要求:使用电压:230V, 电热管功率650W+5-10%;用电脑将电热管CAD图纸画出来,计算出管子的展开长度 为:252mm,

2:计算出电热管电流强度A及加热管电阻值Ω, I-电流强度A ,P-电热管功率W, V-工作电压V, R-电阻值Ω,I=P /U;=650/230=2.83A;R=U/I=230/2.83=81.3Ω

3,根据常用的加热管电阻值Ω国标范围:+5-10%电阻值(公司的标准为:+4-8%计算)=等于出厂电阻,特别说明:按国标是+5-10%,为啥按+4-8%计算,计算时把电阻范围缩小,就是说:在生产中电阻超出+4-8%范围,还在+5-10%范围内,这样不会出现电阻偏大偏小.电阻下限值: 81.3÷1,04=78.1Ω;电阻上限值: 81.3÷0,92=88.3Ω

In the design, the production process heating pipe, heating pipe resistance value, determines the power of a heater(电热管功率), GB stipulates, electric heating tube power error range and an electric heating pipe resistance error range, the following article I will introduce how to calculate the 1 aluminum heating pipe resistance range value, heating in what range of resistance within the tube to comply with the relevant standards.
1: got the customer’s drawings, understand customer requirements: using voltage: 230V, power 650W+5-10%; the electric heating pipe with computer CAD drawing out, calculate the pipe length: 252mm,
2: calculates the current intensity is A and the electric heating pipe resistance value(电热管电阻值), I- current intensity of A, P- heat pipe power(电热管功率) W, V- working voltage V, R- resistance, I=P /U; =650/230=2.83A; R=U/I=230/2.83=81.3.
3, according to the common heating pipe resistance value of Omega GB range: +5-10% resistance value (the company standard: +4-8%) = factory resistance special note: according to national standard +5-10%, why is calculated according to +4-8%, the resistance range is narrow, that is: in the production of resistance beyond the scope of +4-8%, still in the range of +5-10% this will not occur, larger resistance is small. The resistance limit: 81.3 / 1,04=78.1 Ω; resistance limit: 81.3 / 0,92=88.3

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