這張是L相.
這張為N相.漂亮MM請各位高手幫忙看看,電源傳導不過,要如何改進?
電源的輸入為220VAC,輸出為+-15、24、5VDC.傳導在1M前和8M左右均超標,不知道要采用什么措施可以控制,請各位大俠請點一二,非常感謝!這張是L相.
這張為N相.
這張是L相.
這張為N相.全部回復(17)
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Looks like, this is a switching power supply, the "bad" frequency" from your pic are 160K, 320K and around 640K. They're narrow Band. I guess your primary switching freq is around 80K or 160K. Thus, you need to improve your primary design to kill this low freq spur. Without Schematic, I don't know how to improve it.As far as the 8MHz, it is wide band, try to use a larger common choke at AC input side, and see if it works.
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@xiang_97124
Lookslike,thisisaswitchingpowersupply,the"bad"frequency"fromyourpicare160K,320Kandaround640K.They'renarrowBand.Iguessyourprimaryswitchingfreqisaround80Kor160K.Thus,youneedtoimproveyourprimarydesigntokillthislowfreqspur.WithoutSchematic,Idon'tknowhowtoimproveit.Asfarasthe8MHz,itiswideband,trytousealargercommonchokeatACinputside,andseeifitworks.
謝謝高手指點,我先試試.非常感謝!
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