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redrock99
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樓主  發(fā)表于: 2019-11-04 19:28
運行時(shí)時(shí)KM8先閉合1秒,直流回路會(huì )有300+V的直流吸和電磁鐵,吸和后,KM8斷開(kāi),然后直流回路就只有60V的直流了,做到了電壓無(wú)縫轉換。

這個(gè)變壓器原邊副邊這樣接到一起的用法很大膽啊,初次見(jiàn)到,

問(wèn)題來(lái)了,507對地會(huì )有多少V電壓呢?320V嗎?
龍云浪子
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1樓  發(fā)表于: 2019-11-04 22:14
如果進(jìn)線(xiàn)2、6是接380v,KM8閉合時(shí)的直流輸出電壓應該是380*0.9=342v左右(橋式整流)。
507的對地電壓則要看兩組線(xiàn)圈相對繞線(xiàn)方向(是否同名端),大概是單相電壓±67v。
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    cailiang123
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    2樓  發(fā)表于: 2019-11-07 15:08
    你把他當成自耦變壓器就好理解了,這種一般是大型感性負載大電流吸合,小電流保持。高壓接近380,低壓接近67。

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