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class="hamb">当前位置：技术文章</div> </div> </div> </div> <div class="ye2cqxo" id="newsdt"> <div id="ye2cqxo" class="news_con"> <div id="ye2cqxo" class="container pr clearfix"> <div id="ye2cqxo" class="artInfo-left"> <h1 class="artInfo-name">变频器对电动机的?；び心男?/h1> <div id="ye2cqxo" class="artInfo-ab"> <span>发布时间：10-22</span> <span>浏览数：<span id="onclick"></span><script> getOnclick() </script></span> </div> <div id="ye2cqxo" class="artInfo-con"> <p style="line-height: 2;"><span style="font-family: 宋体; font-size: 14px;">变频器广泛应用于各行业，主要是由于其节能和变频调速的功能在设备和工况系统中应用，那么变频器是从哪些方面来对电机起到?；ぷ饔玫哪?？下面我们将对这一问题进行分析解答。 </span><br style="font-family: "sans serif", tahoma, verdana, helvetica; font-size: 12px;" /> <span style="font-family: 宋体; font-size: 14px;"> 变频器对电机的?；ぶ饕幸韵录阜矫妫汗缪贡；?、欠电压保护、过电流保护、缺相?；ぁ⒎聪啾；ぁ⒐汉杀；?、接地保护、短路?；?、超频?；ず褪俦；?。下面就这几类变频器对电机的?；し绞浇屑虻サ慕樯?。 </span><br style="font-family: "sans serif", tahoma, verdana, helvetica; font-size: 12px;" /> <span style="font-family: 宋体; font-size: 14px;">1．过电压保护： </span><br style="font-family: "sans serif", tahoma, verdana, helvetica; font-size: 12px;" /> <span style="font-family: 宋体; font-size: 14px;"> 变频器的输出有电压检测功能，变频器能自动调整输出电压，使电机不承受过电压。即使在输出电压调整失效和输出电压超过正常电压的110%时，变频器也会通过?；缘缁鸬奖；ぷ饔?。 </span><br style="font-family: "sans serif", tahoma, verdana, helvetica; font-size: 12px;" /> <span style="font-family: 宋体; font-size: 14px;">2．欠电压保护： </span><br style="font-family: "sans serif", tahoma, verdana, helvetica; font-size: 12px;" /> <span style="font-family: 宋体; font-size: 14px;"> 当电机的电压低于正常电压的90%时，变频器保护?；?。 </span><br style="font-family: "sans serif", tahoma, verdana, helvetica; font-size: 12px;" /> <span style="font-family: 宋体; font-size: 14px;">3．过电流保护： </span><br style="font-family: "sans serif", tahoma, verdana, helvetica; font-size: 12px;" /> <span style="font-family: 宋体; font-size: 14px;"> 当电机的电流超过额定值的150%/3秒钟，或额定电流的200%/10微秒，变频器通过?；幢；さ缁?。 </span><br style="font-family: "sans serif", tahoma, verdana, helvetica; font-size: 12px;" /> <span style="font-family: 宋体; font-size: 14px;">4．缺相?；ぃ?nbsp;</span><br style="font-family: "sans serif", tahoma, verdana, helvetica; font-size: 12px;" /> <span style="font-family: 宋体; font-size: 14px;"> 监测输出电压，当输出缺相时，变频器报警，一段时间后变频器通过停机来?；さ缁?。 </span><br style="font-family: "sans serif", tahoma, verdana, helvetica; font-size: 12px;" /> <span style="font-family: 宋体; font-size: 14px;">5．反相保护： </span><br style="font-family: "sans serif", tahoma, verdana, helvetica; font-size: 12px;" /> <span style="font-family: 宋体; font-size: 14px;"> 变频器使电机只能沿一个方向旋转，无法设定旋转方向，除非用户改动电机A、B、C接线的相序，否则没有反相的可能。</span><br style="font-family: "sans serif", tahoma, verdana, helvetica; font-size: 12px;" /> <span style="font-family: 宋体; font-size: 14px;">6．过负荷?；ぃ?nbsp;</span><br style="font-family: "sans serif", tahoma, verdana, helvetica; font-size: 12px;" /> <span style="font-family: 宋体; font-size: 14px;">变频器监测电机电流，当电机电流超过额定电流的120%/1分钟时，变频器通过?；幢；さ缁?nbsp;</span><br style="font-family: "sans serif", tahoma, verdana, helvetica; font-size: 12px;" /> <span style="font-family: 宋体; font-size: 14px;">7．接地?；ぃ?nbsp;</span><br style="font-family: "sans serif", tahoma, verdana, helvetica; font-size: 12px;" /> <span style="font-family: 宋体; font-size: 14px;"> 变频器配有专门的接地保护电路，一般由接地?；せジ衅骱图痰缙鞴钩?，当发生一相或两相接地时，变频器报警。当然如果用户要求，我们也可以设计为接地后立即?；ね；?。 </span><br style="font-family: "sans serif", tahoma, verdana, helvetica; font-size: 12px;" /> <span style="font-family: 宋体; font-size: 14px;">8．短路?；ぃ?nbsp;</span><br style="font-family: "sans serif", tahoma, verdana, helvetica; font-size: 12px;" /> <span style="font-family: 宋体; font-size: 14px;"> 变频器输出短路后，必然引起过流，在10微秒内变频器通过?；幢；さ缁?。 </span><br style="font-family: "sans serif", tahoma, verdana, helvetica; font-size: 12px;" /> <span style="font-family: 宋体; font-size: 14px;">9．超频?；ぃ?nbsp;</span><br style="font-family: "sans serif", tahoma, verdana, helvetica; font-size: 12px;" /> <span style="font-family: 宋体; font-size: 14px;"> 变频器有最大和最小频率限制功能，使输出频率只能在规定的范围内，由此实现超频?；すδ?。 </span><br style="font-family: "sans serif", tahoma, verdana, helvetica; font-size: 12px;" /> <span style="font-family: 宋体; font-size: 14px;">10．失速保护： </span><br style="font-family: "sans serif", tahoma, verdana, helvetica; font-size: 12px;" /> <span style="font-family: 宋体; font-size: 14px;"> 失速?；ひ话阏攵酝降缁?。对于异步电机，加速过程中的失速必然表现为过电流，变频器通过过电流和过负荷?；な迪执讼畋；すδ?。减速过程中的失速可通过在调试过程中设定安全的减速时间来避免。</span></p> </div> <div id="ye2cqxo" class="artInfo-page clearfix"> <p class="fl"><span id="ye2cqxo" class="type">上一篇 :</span><a href='/news_detail/43.html'>电工如何发展自己</a></p> <p class="fr"><span id="ye2cqxo" class="type">下一篇 :</span><a href='/news_detail/41.html'>电气线路的现场安装布线与调试方法</a></p> </div> </div> <div id="ye2cqxo" class="artInfo-right"> <div id="ye2cqxo" class="aiAbout-news"> <div id="ye2cqxo" class="top">热门文章</div> <ul class="list"> </ul> </div> </div> <div id="ye2cqxo" class="artInfo-right"> <div id="ye2cqxo" class="aiAbout-news"> <div id="ye2cqxo" class="top">热门课程</div> <ul class="list"> </ul> </div> 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