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andy_gao
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樓主  發(fā)表于: 2014-11-21 21:23
溫控器+固態(tài)繼電器是怎么控制電熱管的溫度的，以下2種哪種是對的？？

1、溫控器輸出直流電壓到固態(tài)繼電器，通過(guò)這個(gè)電壓大小，調整固態(tài)繼電器輸出端的電壓，從而控制電熱管的發(fā)熱功率

2、溫控器輸出直流電壓信號到固態(tài)繼電器，有直流電壓后固態(tài)繼電器輸出端通路，電熱管工作。沒(méi)有電壓就斷開(kāi)輸出端，電熱管斷電不工作，只控制電熱管的通斷
deeply
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1樓  發(fā)表于: 2014-11-28 17:16
第一種理論上是可以做，但是實(shí)際上是不需要這樣用的，發(fā)熱體有滯后效應的，不是通了電就馬上發(fā)熱，而且熱量還有傳遞的過(guò)程，所以實(shí)際用處是不大的。如果要控制溫度精度高一點(diǎn)，用第二種方式，加快開(kāi)關(guān)頻率就好了，

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