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 <title><![CDATA[变频器在50Hz时的输出电压]]></title>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-75439.html]]></link>
 <description><![CDATA[Latest 50 replies of 变频器在50Hz时的输出电压]]></description>
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 <title><![CDATA[工控人家园]]></title>
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 <title><![CDATA[]]></title>
 <description><![CDATA[变频器不能升压，可能你测量有问题，用整流系指针表再测测]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-75439#856322.html]]></link>
 <author><![CDATA[ydc820]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Sun, 29 Aug 2010 17:20:44 +0000]]></pubdate>
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<item>
 <title><![CDATA[]]></title>
 <description><![CDATA[频率低了电压应该升高
 [s:28]]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-75439#855878.html]]></link>
 <author><![CDATA[卧龙湾]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Sun, 29 Aug 2010 01:28:13 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[变频器输出的电压波形并非正弦波，而万用表设计时都是按正弦波的设计的即有效值＝0.707*最大值,所以测量变频器时只能看有无输出，而不能测出有多大的输出。]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-75439#855873.html]]></link>
 <author><![CDATA[hxl202319]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Sun, 29 Aug 2010 00:50:42 +0000]]></pubdate>
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<item>
 <title><![CDATA[]]></title>
 <description><![CDATA[[s:39]]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-75439#855496.html]]></link>
 <author><![CDATA[舒中胜]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Sat, 28 Aug 2010 07:12:50 +0000]]></pubdate>
</item>
<item>
 <title><![CDATA[]]></title>
 <description><![CDATA[请问哪位高手为什么会这样]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-75439#855495.html]]></link>
 <author><![CDATA[舒中胜]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Sat, 28 Aug 2010 07:12:02 +0000]]></pubdate>
</item>
<item>
 <title><![CDATA[]]></title>
 <description><![CDATA[我在30HZ时测到700V]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-75439#855492.html]]></link>
 <author><![CDATA[舒中胜]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Sat, 28 Aug 2010 07:09:47 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[指针表有的也测不准。但电压与频率的关系可能就要看V/F曲线了要根据你的实际情况]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-75439#855445.html]]></link>
 <author><![CDATA[asxll]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Sat, 28 Aug 2010 05:53:13 +0000]]></pubdate>
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<item>
 <title><![CDATA[]]></title>
 <description><![CDATA[好像要用方波表]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-75439#855422.html]]></link>
 <author><![CDATA[dzj126]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Sat, 28 Aug 2010 04:59:24 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[如果是使用v/F控制方式，变频器输出是等幅而不等宽的脉冲电压，所以用万用表测量时会有误差。]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-75439#855272.html]]></link>
 <author><![CDATA[雪中梅花]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Fri, 27 Aug 2010 22:06:49 +0000]]></pubdate>
</item>
<item>
 <title><![CDATA[]]></title>
 <description><![CDATA[你用指针万用表再测一下看看，数字万用表测这个相当的不准！]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-75439#854887.html]]></link>
 <author><![CDATA[zhengyueyong]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Fri, 27 Aug 2010 05:22:29 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[v/F，原来还测到600多的]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-75439#854884.html]]></link>
 <author><![CDATA[niningtt]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Fri, 27 Aug 2010 05:18:40 +0000]]></pubdate>
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