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 <title><![CDATA[开关电源无输出或输出电压很低，有没有达 ..]]></title>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-88106.html]]></link>
 <description><![CDATA[Latest 50 replies of 开关电源无输出或输出电压很低，有没有达 ..]]></description>
 <copyright><![CDATA[Copyright(C) 工控人家园]]></copyright>
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 <description><![CDATA[这个只能说明你的开关电源的带负载能力已经下降。如果空载情况下输出电压只能在20V左右，是需要检修开关电源了。]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-88106#917861.html]]></link>
 <author><![CDATA[wwcwwc]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Wed, 01 Dec 2010 00:10:42 +0000]]></pubdate>
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 <description><![CDATA[我到一个AC220V/DC24V也出现电压低带不起触摸屏，换了就好了。]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-88106#917851.html]]></link>
 <author><![CDATA[szzhang001]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Tue, 30 Nov 2010 23:19:05 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[[s:21]&nbsp;&nbsp;[s:26]]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-88106#917793.html]]></link>
 <author><![CDATA[云宵城主]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Tue, 30 Nov 2010 15:37:54 +0000]]></pubdate>
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 <description><![CDATA[380伏变24伏的没见过，应该是里面什么元件坏了把]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-88106#915009.html]]></link>
 <author><![CDATA[ziji2009]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Sat, 27 Nov 2010 11:29:21 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[[s:28]]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-88106#914904.html]]></link>
 <author><![CDATA[舒中胜]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Sat, 27 Nov 2010 08:56:23 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[是不是哪里接触不良]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-88106#914902.html]]></link>
 <author><![CDATA[舒中胜]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Sat, 27 Nov 2010 08:55:41 +0000]]></pubdate>
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 <description><![CDATA[要先脱掉负载后再测的，这样比较的能判断问题]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-88106#914900.html]]></link>
 <author><![CDATA[wengjun8250]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Sat, 27 Nov 2010 08:52:06 +0000]]></pubdate>
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 <description><![CDATA[你负载端DC24V是不是接地上去了啊、 线漏电什么的]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-88106#914887.html]]></link>
 <author><![CDATA[shaolin316]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Sat, 27 Nov 2010 08:27:23 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[负载短路或严重过载时就会切断输出，或者是输入缺相或接触不好，我们厂就是用的这个]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-88106#914373.html]]></link>
 <author><![CDATA[penzhenjian]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Fri, 26 Nov 2010 13:51:01 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[你去找一个50V/1000UF的电解电容，（注意要分正负极，新电容短的那个脚是负极，长的那个是正极，或看电容外表有标记的那边是负极），把电容并在电源的正负极上，如果有所好转，那就是开关电源的输出端的滤波电容失效了；此电容失效会造成电源的负载能力下降或输出电压下降甚至对下一级造成干扰。]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-88106#914244.html]]></link>
 <author><![CDATA[工控学子]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Fri, 26 Nov 2010 11:52:07 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[我还看到3相380变24v的，40安的，西门子的]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-88106#914234.html]]></link>
 <author><![CDATA[buddy]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Fri, 26 Nov 2010 11:45:11 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[可能是短路或接地吧]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-88106#914232.html]]></link>
 <author><![CDATA[yuming1231]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Fri, 26 Nov 2010 11:38:07 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[有可能是短路保护了]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-88106#914222.html]]></link>
 <author><![CDATA[小春哥]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Fri, 26 Nov 2010 11:29:53 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[一个灯泡的负载应该不会照成过载保护，那就是短路，空载的情况输出应该有可调电阻，调到24V再试吗，如果还是这情况的话，1，确定负载的容量与好坏，再考虑更换开关电源]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-88106#914130.html]]></link>
 <author><![CDATA[木獬]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Fri, 26 Nov 2010 09:05:08 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[断路了 ！]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-88106#913747.html]]></link>
 <author><![CDATA[jickyzhu]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Fri, 26 Nov 2010 02:03:05 +0000]]></pubdate>
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 <description><![CDATA[我准备换一个220V的了！谢谢]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-88106#913722.html]]></link>
 <author><![CDATA[wangqiang82]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Fri, 26 Nov 2010 01:36:28 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[380VAC变24VDC，比较少见，楼主可把电源拆开，先查下变压器变压是否有问题，再查交变直是否有问题，最后查稳压部分。如果不想麻烦就根据负载容量换个220VAC变24VDC的电源。楼主的那种真的很少见。]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-88106#913695.html]]></link>
 <author><![CDATA[shaolinsi]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Fri, 26 Nov 2010 01:09:55 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[7楼哥，我是在断电一天后才断开的负载，通的电，测的输出是18-19VDC。这个和你说的电源放电有关系吗？谢谢]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-88106#913687.html]]></link>
 <author><![CDATA[wangqiang82]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Fri, 26 Nov 2010 00:59:25 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[一些开关电源超载保护后，要断开负载关闭电源等电源放完电才能复位，然后通电输出才正常]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-88106#913553.html]]></link>
 <author><![CDATA[萧风]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Thu, 25 Nov 2010 14:36:47 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[2樓,5樓說的很對，先將負載斷開看看輸出電壓是否有變正常]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-88106#913108.html]]></link>
 <author><![CDATA[zyfzxh]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Thu, 25 Nov 2010 07:32:15 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[开关电源的DC输出端通常都有过载限流保护，负载短路或严重过载时就会切断输出，即使异常负载马上切除，起切断保护很可能仍将保持一段时间，380V输入DC24V输出的开关电源应该不多见吧，我没遇到过]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-88106#913105.html]]></link>
 <author><![CDATA[detect]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Thu, 25 Nov 2010 07:27:41 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[都是220V变24V的多，这380的还真没见过。]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-88106#913097.html]]></link>
 <author><![CDATA[汇荣铝业]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Thu, 25 Nov 2010 07:17:40 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[从380VAC转换为24VDC的?
这种很少的!
没搞错吧？]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-88106#913073.html]]></link>
 <author><![CDATA[jxh668]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Thu, 25 Nov 2010 06:46:47 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[将开关电源的输出侧负载线解下来，再量一下，看24V如何，先排除一下你的负载短路或接地！]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-88106#913052.html]]></link>
 <author><![CDATA[f118]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Thu, 25 Nov 2010 06:13:12 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[那就是坏了呗，换一个，也不值什么钱]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-88106#913051.html]]></link>
 <author><![CDATA[niningtt]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Thu, 25 Nov 2010 06:10:42 +0000]]></pubdate>
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