1、戶內(nèi)、戶外防腐防爆異步電動(dòng)機(jī) 環(huán)境技術(shù)要求 (機(jī)座號(hào) 45710) 537 1999 國家機(jī)械工業(yè)局 1999 08 06 批準(zhǔn) 2000 01 01 實(shí)施 前 言 本標(biāo)準(zhǔn)是對(duì) 03 89戶內(nèi)、戶外防腐防爆異步電動(dòng)機(jī)環(huán)境技術(shù)要求 (機(jī)座號(hào) 46 710)進(jìn)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(biāo)準(zhǔn)，對(duì)本標(biāo)準(zhǔn)的編寫格式作了調(diào)整，并 對(duì)不宜強(qiáng)制執(zhí)行的內(nèi)容，如 4 6 條關(guān)于防腐防爆電動(dòng)機(jī)表面涂漆工藝的規(guī)定予以刪除。 本標(biāo)準(zhǔn)自實(shí)施之日起代替 04 003 89。 本標(biāo)準(zhǔn)由廣州電器科學(xué)研究所提出并歸口。 本標(biāo)準(zhǔn)由廣州。

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10、,變頻器的輸出電壓大小與頻率大小是同步對(duì)應(yīng)調(diào)整，電動(dòng)機(jī)從靜止開始起動(dòng)，其過程頻率由低調(diào)到高，起動(dòng)時(shí)頻率低電抗值小，起動(dòng)電壓低，利用低頻起動(dòng)具有,.,既可以提高起動(dòng)力矩，又可以降低起動(dòng)電流的優(yōu)點(diǎn)，所以轉(zhuǎn)子槽可以設(shè)計(jì)大一點(diǎn)，降低轉(zhuǎn)子導(dǎo)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(duì)應(yīng)調(diào)整，氣隙磁通中基本也不變，變頻調(diào)速保持電機(jī)的力能指標(biāo)刀基本不變，則電機(jī)的線負(fù)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(dòng)機(jī)的輸入電源，當(dāng)恒轉(zhuǎn)矩負(fù)載時(shí)，電動(dòng)機(jī)的輸。