電(dian)(dian)熱(re)(re)管發(fa)熱(re)(re)量的計算 可以用調壓器通過(guo)改變(bian)輸入電(dian)(dian)壓和電(dian)(dian)流來改變(bian)發(fa)熱(re)(re)量。
發熱量與電(dian)(dian)壓平方成(cheng)正比,與電(dian)(dian)流平方成(cheng)正比。
電壓變為(wei)(wei)原來的1/2時,發熱量變為(wei)(wei)1/4
電流變為原來的(de)1/2時,發熱量(liang)也變為1/4