?!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 石家庄电动机生产厂家(哪家? - 石家庄顺邦机电设备有限公?/title> <meta name="Keywords" content="石家庄电动机生产厂家"> <meta name="Description" content="为你详细介绍石家庄电动机生产厂家产品内容,包括石家庄电动机生产厂家的用途、型号、范围、图片等,在这里你可以得知所有石家庄电动机生产厂家新闻以及最新的市场石家庄电动机生产厂家价格.咨询电话:13932153388"> <meta http-equiv="X-UA-Compatible" content="IE=EmulateIE7"> <script> var __CONTEXT_PATH="/cmsadmin"; var _contextPath=""; var _templatePath="/tpl/demoprd/pdgoallout/"; var _resBasePath="/res/demoprd"; var _forbidF5=true;var _forbidCopy=false;var _forbidContextMenu=false; </script> <link href="/template/NEST60002/lib/cms.css?4.1.0_0" rel="stylesheet" type="text/css" /> <script language="javascript" src="/template/NEST60002/lib/jquery.js?4.1.0_0"></script> <script language="javascript" src="/template/NEST60002/lib/common.js?4.1.0_0"></script> <script language="javascript" src="/template/NEST60002/lib/tpl.js?4.1.0_0"></script> <!-- banner?--> 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href="http://www.mizhishui.com" rel="nofollow">www.mizhishui.com</a> </p> <p>地址:河北省石家庄市长安区建华北大街388号劲驰商?35?/p> </div> </div> </div> <!-- <div class="flbk_db"> </div> --></td> <td valign="top" id="iright"><div class="place2"> <h2>产品详细<span>/Detailed</span></h2> <h3> 您现在的位置:<a href="/">首页</a> > <a href="/supply/">供应产品</a> > <a href="/ddj/">上海大速电?/a> > <a href="/ddj/gydj/">高压电机</a> > <a href="/supply/23.html">石家庄电动机生产厂家</a> </h3> </div> <div class="container"> <table width="100%" border="0" cellspacing="0" cellpadding="0" style=" padding:1px; margin-bottom:12px; border:1px solid #e7e7e7; background:#fafafa;"> <tr> <td width="300" align="center" valign="top" style="padding:10px; border-right:1px solid #e7e7e7;"><p style="border:2px solid #dbdbdb;width:300px;" title="石家庄电动机生产厂家"><img src="http://cmsimgshow.zhuchao.cc/32151/201801231444457043215176430.jpg?path=www.mizhishui.com/uploads/cp/201801231444457043215176430.jpg" width="300" height="400" onload="imgZoomer(this,300,400)" onclick="new ImageViewer(this,'img');" alt="石家庄电动机生产厂家"/></p></td> <td valign="top"><div class="proct_bg1"> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <th width="19%">产品名称?/th> <td width="81%"><h1 style="text-align: center;"><span id="nesttitle">石家庄电动机生产厂家</span></h1></td> </tr> <tr> <th>产品型号?/th> <td></td> </tr> <tr> <th style=" vertical-align:top;">产品简介:</th> <td><p></p></td> </tr> </table> </div></td> </tr> </table> <div class="content"> <h2><span>详细说明</span></h2> <div class="detail"> <p><p style="text-indent:2em;"> <span style="font-size:14px;line-height:2;"><a href="/supply/23.html" target="_blank">石家庄电动机生产厂家</a>想要问大家一个很严肃的问题:大家觉得变频器和电动机之间存在着什么样的联系呢,相信很多人都觉得这是两个问题,不是一个问题,因为他们会觉得变频器和电动机之间没有什么联系,今天我们就一起来开开眼界吧!</span> </p> <p style="text-indent:2em;"> <span style="font-size:14px;line-height:2;">1. 石家庄电动机生产厂家对于绝缘强度问题</span> </p> <p style="text-indent:2em;"> <span style="font-size:14px;line-height:2;"> 目前大多中小型变频器均采用PWM的控制方式。载波频率约为几千到十几千赫,使得电动机定子绕组要承受很高的电压上升率,相当于对电动机施加陡度很大的冲击电压,使电动机的匝间绝缘承受较为严酷的考验。另外,由PWM变频器产生的矩形斩波冲击电压叠加在电动机运行电压上,会对电动机对地绝缘构成威胁,对地绝缘在高压的反复冲击下会加速老化?/span> </p> <p style="text-indent:2em;"> <span style="font-size:14px;line-height:2;">2.石家庄电动机<span style="font-size:14px;">生产</span>厂家针对效率和温升的问题</span> </p> <p style="text-indent:2em;"> <span style="font-size:14px;line-height:2;">变频器无论哪种形式,在运行中均会产生不同程度的谐波电压和电流,使电动机在非正弦电压、电流下运行。高次谐波会引起电动机转子铜(铝)耗、定子铜耗、铁耗及附加损耗的增加,为显著的是转子铜(铝)耗。由于异步电动机以接近于基波频率所对应的同步转速旋转,因此高次谐波电压以较大的转差切割转子导条后,便会产生很大的转子损耗。除此之外,还需考虑因集肤效应所产生的附加铜耗。这些损耗都会使电动机额外发热,效率降低,输出功率减小,如果将普通三相异步电动机运行于变频器输出的非正弦电源条件下,其温升一般要增加10%--20%?  </span> </p> <p style="text-indent:2em;"> <span style="font-size:14px;line-height:2;">3.谐波电磁噪声与震?/span> </p> <p style="text-indent:2em;"> <span style="font-size:14px;line-height:2;">普通异步电动机采用变频器供电时,会使由电磁、通风、机械等因素所引起的震动和噪声变的更加复杂。变频电源中含有的各次时间谐波与电动机电磁部分的固有空间谐波相互干涉,形成各种电磁激振力。当电磁力波的频率和电动机机体的固有振动频率一致或接近时,将产生共振现象,从而加大噪声。由于电动机工作频率范围宽,转速变化范围大,各种电磁力波的频率很难避开电动机的各构件的固有震动频率?/span> </p> <p style="text-indent:2em;"> <span style="font-size:14px;line-height:2;">4.低转速时的冷却问?/span> </p> <p style="text-indent:2em;"> <span style="font-size:14px;line-height:2;">首先,异步电动机的阻抗不尽理想,当电源频率较底时,电源中高次谐波所引起的损耗较大。其次,普通异步电动机再转速降低时,冷却风量与转速的三次方成比例减小,致使电动机的低速冷却状况变坏,温升急剧增加,难以实现恒转矩输出?/span> </p> <p style="text-indent:2em;"> <span style="font-size:14px;line-height:2;">5.石家庄电动机生产厂家对频繁启动、制动的适应能力</span> </p> <p style="text-indent:2em;"> <span style="font-size:14px;line-height:2;">电动机采用变频器供电后,可在很低的频率和电压下以无冲击电流的方式启动,并可利用变频器所供的各种制动方式进行快速制动,为实现频繁启动和制动创造了条件,因而电动机的机械系统和电磁系统处于循环交变力的作用下,给机械结构和绝缘结构带来疲劳和加速老化问题?/span> </p> <p style="text-indent:2em;"> <span style="font-size:14px;"><span style="font-size:14px;line-height:2;">通过以上的介绍,相信大家对于电动机也是受变频器的影响有了一定的了解了,当然关于电动机方面的问题石家?/span><span style="font-size:14px;line-height:2;">电动?span style="font-size:14px;">生产</span>厂家就先暂时为大家介绍到这里了,如果大家有更多的问题想要咨询的,欢迎随时来电咨询或者随时关注我们的动态!</span><span style="font-size:14px;line-height:2;"></span></span> </p> <p style="text-align:center;text-indent:2em;"> <span style="font-size:14px;"><span style="font-size:14px;line-height:2;"><img src="http://cmsimgshow.zhuchao.cc/32151/201801231445053613215157708.jpg" width="400" height="300" title="石家庄电动机厂家" alt="石家庄电动机厂家" /><br /> </span></span> </p> <p style="text-align:center;text-indent:2em;"> <span style="font-size:14px;"><span style="font-size:14px;line-height:2;"><br /> </span></span> </p> <p style="text-indent:2em;"> <br /> </p> <p style="text-indent:2em;"> <br /> </p> <p style="text-indent:2em;"> <br /> </p> <p style="text-indent:2em;"> <br /> </p> <p style="text-indent:2em;"> <br /> </p> <p style="text-indent:2em;"> <br /> </p> <p 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