異步電動機

1、戶內(nèi)、戶外防腐防爆異步電動機 環(huán)境技術(shù)要求 (機座號 45710) 537 1999 國家機械工業(yè)局 1999 08 06 批準 2000 01 01 實施 前 言 本標準是對 03 89戶內(nèi)、戶外防腐防爆異步電動機環(huán)境技術(shù)要求 (機座號 46 710)進行的修訂。 修訂后的 537 1999 的技術(shù)內(nèi)容與 04 003 89 基本一致。按 T 1 11993、 T 1 3 1997，增加了前言、引用標準，對本標準的編寫格式作了調(diào)整，并 對不宜強制執(zhí)行的內(nèi)容，如 4 6 條關(guān)于防腐防爆電動機表面涂漆工藝的規(guī)定予以刪除。 本標準自實施之日起代替 04 003 89。 本標準由廣州電器科學研究所提出并歸口。 本標準由廣州。

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7、購買設(shè)計文檔后加 費領(lǐng)取圖紙 購買設(shè)計文檔后加 費領(lǐng)取圖紙 畢業(yè)設(shè)計說明書 論文題目：三相異步電動機的正反轉(zhuǎn)及順序控制電路的設(shè)計 系 部： 專 業(yè)： 班 級： 學生姓名： 學 號： 指導教師： 2016年 3月 18日 購買設(shè)計文檔后加 費領(lǐng)取圖紙 購買設(shè)計文檔后加 費領(lǐng)取圖紙 I 目 錄 摘要 . 緒論。

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10、,變頻器的輸出電壓大小與頻率大小是同步對應(yīng)調(diào)整，電動機從靜止開始起動，其過程頻率由低調(diào)到高，起動時頻率低電抗值小，起動電壓低，利用低頻起動具有,.,既可以提高起動力矩，又可以降低起動電流的優(yōu)點，所以轉(zhuǎn)子槽可以設(shè)計大一點，降低轉(zhuǎn)子導條電阻，減小轉(zhuǎn)子銅耗，繞組的匝數(shù)繞組系數(shù)繞組相數(shù)極數(shù)等是不,.,變值，變頻器的輸出電壓大小和頻率是同步對應(yīng)調(diào)整，氣隙磁通中基本也不變，變頻調(diào)速保持電機的力能指標刀基本不變，則電機的線負荷也基本不變，由變頻,.,器輸出電壓作為變頻調(diào)速異步電動機的輸入電源，當恒轉(zhuǎn)矩負載時，電動機的輸。