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老學(xué)生
梅花香自苦寒來(lái)
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樓主  發(fā)表于: 2018-05-18 11:12
最近遇到一個(gè)問(wèn)題，請各位老師給指點(diǎn)指點(diǎn)。一個(gè)加熱器，功率2.5KW，電壓110V（AC)。想把電流降下來(lái)點(diǎn)電壓不變有什么實(shí)用的好方法。
nightblueblu
道阻且長(cháng)，窮且益堅。
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1樓  發(fā)表于: 2018-05-21 08:55
這個(gè)怕是不行  阻性負載不降電壓   怎么降電流？   串電阻也就相當于分壓了   用可控硅控制半周期導通時(shí)間   或者串二極管同樣的是降低了電壓  最好的就是換個(gè)小功率的加熱器或者直接降低其供電電壓    串東西在電路上也是有功耗的   起不了節能的作用
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