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xzygongkong
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樓主  發(fā)表于: 2011-12-30 09:56
最近修了三臺康沃的 ZC系列注塑機專(zhuān)業(yè)變頻器，維修前顯示P.OFF，我測過(guò)直流母線(xiàn)電壓正常，由于現場(chǎng)條件不允許，我把電源板寫(xiě)下來(lái)用220V整流充當母線(xiàn)電壓，發(fā)現UC3844的電源端穩壓不夠，于是更換了18V穩壓管，裝機后故障排除，可是用了一個(gè)月后1個(gè)變頻器出現同樣問(wèn)題，我又更換了穩壓管，又用了一個(gè)月，現在其余兩個(gè)也相繼出現最初的問(wèn)題，請各位專(zhuān)家指點(diǎn)迷津。謝謝了。
柴華
做個(gè)合格的工控人
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1樓  發(fā)表于: 2012-01-01 10:38
穩壓管負荷過(guò)重，或者穩壓管功率過(guò)小
柴華

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