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樓主  發(fā)表于: 2015-10-23 21:58
三菱FRD740-0.75kw變頻器控制0.55kw普通三相交流異步電動(dòng)機,電機有嘯叫,摩擦響聲。
新變頻器,我上電后設置P1頻率上限為50HZ,P2頻率下限為0HZ ,P3電機頻率5OHZ,P9電流為1.56A。
其他的也沒(méi)設什么了,我用PU模式JOG點(diǎn)動(dòng)試機,有嘯叫摩擦聲音。
我我的啟動(dòng)是RM外部控制,我把P79設為3,用外部啟動(dòng)時(shí)還是這樣的情況,有嘯叫摩擦的聲音。
請問(wèn)各位同仁們,遇到 過(guò)這種情況嗎?另外,直接用三相電帶電機沒(méi)有一點(diǎn)聲音,經(jīng)過(guò)變頻器之后就會(huì )嘯叫。另外我都是在50HZ下試車(chē)的。在嘯叫時(shí)的電流為1.6A左右,電壓為430V左右。
大家分析一下原因吧,謝謝了。
我這還有個(gè)伺服驅動(dòng)器要設置,昨天上電試試,空載都有嘯叫呀,真不知道為什么呀。。。

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