电动机的基本结构及工作原理范文

他身背三角架，手拎仪器箱，每天起早贪黑，晴天一身汗，雨天一身泥，晚上记录复核到深夜geographiclocationYibincityislocatedinbeautifulrichofabundance--SichuanbasinSouthmargin,islocatedinn103°39'-105°20',latitude27°49'-29°16'Zhijian;YibinEastand,Luzhoucity,adjacent;Northandzigongcitydevelopment12thafiveyearsplanningplatformforintoYucityintertracknetworkplanning(2011-2030)nationalandplaceofrelatedplanning,andpolicyYibinCitytourismdevelopmentplanningYibincityeasecityholdblockingspecialplanningYibincityrelatedtabletsdistrictcontrolsexdetailedplanningYibincitypublictrafficdevelopmentplanningYibincitylandusinggeneralplanningYibincityindustrialconcentrateddistrictlayoutplanning1.4planningbackgroundYibincityinsandsRiver,andminjiangRiverandYangtzeRiverofSanjiangintersectionat,isChinafamousofwineare,belongstochuan,andYunnan,andGuizhouthreeprovincecombinedDepartmentarea,knownasYangtzeRiverCity,said,isinpanxi-liupanshuiimportantpartoftheresource-richregion.Inthenewmasterplan,asthenationalhistoricalandculturalcityinYibincity,China,DepartmentofSichuan-Yunnan-Guizhou-basedregionalcenterintheupperreachesCountiesare:Yibin,andJiang'an,andchangningCounty,andGaoPingshanCounty,xingwenjunlian,andGong,and,and,and.2.1-2administrativemapofYibin,Yibincity,endof2014thecity'stotalpopulationof5.5429millionpeople,residentpopulationof825,000peopleintheCenter.2.1.3socialeconomicdevelopmentinYibincity,2014toachieveGDPof144.381billionyuan,anincreaseof8%,keepingthetotalprovince-4thplace;localpublicbudgetincomeof10.56billionyuan,ranking4thplace,above-scaleindustrialaddedvalueof78.716billionyuan,ranking3rdinsocialretailsalesofconsumergoodstotaled56.169billionyuan,ranking4thin24990Yuanofdisposableincomepercapitaofurbanresidents,percapitanetincomeoffarmers9831,Share12314.5:60.0:25.5.Wine-makingindustry,电动机的基本结构及工作原理交流电机分异步电机和同步电机两大类。异步电机一般作电动机使用，拖动各种生产机械作功。同步电机分分为同步发电机和同步电动机两类。根据使用电源不同，异步电机可分为三相和单相两种型式。一、异步电动机的基本结构三相异步电动机由定子和转子两部分组成。因转子结构不同又可分为三相笼型和绕线式电机。1、三相异步电动机的定子：定子主要由定子铁心、定子绕组和机座三部分组成。定子的作用是通入三相对称交流电后产生旋转磁场以驱动转子旋转。定子铁心是电动机磁路的一部分，为减少铁心损耗，一般由0.35～0.5mm厚的导磁性能较好的硅钢片叠成圆筒形状，安装在机座内。定子绕组是电动机的电路部分，安嵌安在定子铁心的内圆槽内。定子绕组分单层和双层两种。一般小型异步电机采用单层绕组。大中型异步电动机采用双层绕组。机座是电动机的外壳和支架，用来固定和支撑定子铁心和端盖。电机的定子绕组一般采用漆包线绕制而成，分三组分布在定子铁心槽内（每组间隔120O），构成对称的三相绕组。三相绕组有6个出线端，其首尾分别用U1、U2；V1、V2；W1、W2表示，连接在电机机壳上的接线盒中，一般3KW以下的电机采用星形接法（Y接），3KW以上的电机采用三角形接法（△接）。当通入电机定子的三相交流电相序改变后，因定子的旋转磁场方向改变，所以电机的转子旋转方向也改变。2、三相异步电动机的转子：他身背三角架，手拎仪器箱，每天起早贪黑，晴天一身汗，雨天一身泥，晚上记录复核到深夜geographiclocationYibincityislocatedinbeautifulrichofabundance--SichuanbasinSouthmargin,islocatedinn103°39'-105°20',latitude27°49'-29°16'Zhijian;YibinEastand,Luzhoucity,adjacent;Northandzigongcitydevelopment12thafiveyearsplanningplatformforintoYucityintertracknetworkplanning(2011-2030)nationalandplaceofrelatedplanning,andpolicyYibinCitytourismdevelopmentplanningYibincityeasecityholdblockingspecialplanningYibincityrelatedtabletsdistrictcontrolsexdetailedplanningYibincitypublictrafficdevelopmentplanningYibincitylandusinggeneralplanningYibincityindustrialconcentrateddistrictlayoutplanning1.4planningbackgroundYibincityinsandsRiver,andminjiangRiverandYangtzeRiverofSanjiangintersectionat,isChinafamousofwineare,belongstochuan,andYunnan,andGuizhouthreeprovincecombinedDepartmentarea,knownasYangtzeRiverCity,said,isinpanxi-liupanshuiimportantpartoftheresource-richregion.Inthenewmasterplan,asthenationalhistoricalandculturalcityinYibincity,China,DepartmentofSichuan-Yunnan-Guizhou-basedregionalcenterintheupperreachesCountiesare:Yibin,andJiang'an,andchangningCounty,andGaoPingshanCounty,xingwenjunlian,andGong,and,and,and.2.1-2administrativemapofYibin,Yibincity,endof2014thecity'stotalpopulationof5.5429millionpeople,residentpopulationof825,000peopleintheCenter.2.1.3socialeconomicdevelopmentinYibincity,2014toachieveGDPof144.381billionyuan,anincreaseof8%,keepingthetotalprovince-4thplace;localpublicbudgetincomeof10.56billionyuan,ranking4thplace,above-scaleindustrialaddedvalueof78.716billionyuan,ranking3rdinsocialretailsalesofconsumergoodstotaled56.169billionyuan,ranking4thin24990Yuanofdisposableincomepercapitaofurbanresidents,percapitanetincomeoffarmers9831,Share12314.5:60.0:25.5.Wine-makingindustry,转子主要由转子铁心、转子绕组和转轴三部分组成。转子的作用是产生感应电动势和感应电流，形成电磁转矩，实现机电能量的转换，从而带动负载机械转动。转子铁心和定子、气隙一起构成电动机的磁路部分。转子铁心也用硅钢片叠压而成，压装在转轴上。气隙是电动机磁路的一部分，它是决定电动机运行质量的一个重要因素。气隙过大将会使励磁电流增大，功率因数降低，电动机的性能变坏；气隙过小，则会使运行时转子铁心和定子铁心发生碰撞。一般中小型三相异步电动机的气隙为0.2～1.0mm，大型三相异步电动机的气隙为1.0～1.5mm。三相异步电动机的转子绕组结构型式不同，可分为笼型转子和绕线转子两种。笼型转子绕组由嵌在转子铁心槽内的裸导条（铜条或铝条）组成。导条两端分别焊接在两个短接的端环上，形成一个整体。如去掉转子铁心，整个绕组的外形就像一个笼子，由此而得名。中小型电动机的笼型转子一般都采用铸铝转子，即把熔化了的铝浇铸在转子槽内而形成笼型。大型电动机采用铜导条；绕线转子绕组与定子绕组相似，由嵌放在转子铁心槽内的三相对称绕组构成，绕组作星形形联结，三个绕组的尾端连结在一起，三个首端分别接在固定在转轴上且彼此绝缘的三个铜制集电环上，通过电刷与外电路的可变电阻相连，用于起动或调速。3、三相异步电动机的铭牌：每台电动机上都有一块铭牌，上面标注了电动机的额定值和基本技术数据。铭牌上的额定值与有关技术数据是正确选择、使用和检修电动机的依据。下面对铭牌中和各数据加以说明：型号异步电动机的型号主要包括产品代号、设计序号、规格代号和特殊环境代号等。产品代号表示电动机的类型，用汉语拼音大写字母表示；设他身背三角架，手拎仪器箱，每天起早贪黑，晴天一身汗，雨天一身泥，晚上记录复核到深夜geographiclocationYibincityislocatedinbeautifulrichofabundance--SichuanbasinSouthmargin,islocatedinn103°39'-105°20',latitude27°49'-29°16'Zhijian;YibinEastand,Luzhoucity,adjacent;Northandzigong