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henku
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樓主  發(fā)表于: 2008-11-07 11:38
最近在工作中遇見(jiàn)日立  L200的變頻器輸入為單相ＡＣ２２０Ｖ卻帶ＡＣ３８０Ｖ的電機．為此我至今不明白這是何原理．現慶給位大仙指點(diǎn)下．
821937642
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1樓  發(fā)表于: 2008-11-30 16:23
31樓正解，例如100伏三相交流電變直流電是多少伏？

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