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聊聊三相異步電動機接線

更新時間:2019-05-14 15:11:18點擊次數:3196次
三相異步電動機的接線盒內有u v w三相的接線端子,但是怎么沒有零線的接線端子呢,不是說相線要和零線才能構成回路嗎,如果三相電動機不接零線,在三相負載不平衡時,電流怎么流回去呢?
       三相異步電動機的接線盒內有u v w三相的接線端子,但是怎么沒有零線的接線端子呢,不是說相線要和零線才能構成回路嗎,如果三相電動機不接零線,在三相負載不平衡時,電流怎么流回去呢?

电子游艺        SHOUXIAN,SANXIANGYIBUDIANDONGJIRUGUOSHI△JIEXIANJIUMEIYOUZHONGXINGDIAN,YEJIUBUHUIYOULINGXIANDEJIEXIANDUANZI;XINGXINGDEHUA:YOUYUXINGXINGJIEXIANYOUGEZHONGXINGDIAN,DANGSANXIANGFUZAIPINGHENGSHI,CIDIANDEDIANYAWEILING,Ua+Ub+Uc=Um*sin(wt)+Um*sin(wt-120°)+Um*sin(wt+120°)=0,XIANGXIJISUANGUOCHENGSHENGLVE,CIDIANKEJIELINGXIAN。RUGUOSANXIANGXIANDIANYAWEI380V,ZEDIANJIMEIXIANGRAOZUSHANGJIAZAIDEDIANYAWEI220v。ZAIKANXIANDIANLIU,YOUYU Ia+Ib+Ic=Im*cos(wt)+Im*cos(wt-120°)+Im*cos(wt+120°)=0,GUBUYONGJIELINGXIAN,JIELEYEMEIYONGMA,YOUBULIUGUODIANLIU。BUPINGHENGYEBUJIELINGXIANZEYOUUa/Za+Ub/Zb+Uc/ZcJUEDING,CISHIBUDENGYU0,GUZHONGXINGDIANFASHENGPIANYI,DINGZISHANGJIAZAIDEXIANDIANYAYEFASHENGBODONG,HEYUANLAISANXIANGFUZAIPINGHENGSHIXIANGBI,DIANLIUHUANZAIZHESANXIANGFUZAIZHONGLIUDONG,DANDIANLIUYEFASHENGLEBODONG,BIRUMOUXIANGLIURU,LINGLIANGXIANGLIUCHU,DANSANXIANGFUZAIZHONGZONGDIANLIUHUANSHIPINGHENGDE,GENJUSHIJIERHUOFUDIANLIUDINGLVYEJIUSHILIURUDUOSHAO,HUANLIUCHUDUOSHAO。

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