MEM86-192K + 192KRAM
MEM86-192K + 192KRAM
MEM86-192K + 192KRAM
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3）永磁同步電動機的尺寸較異步電動機大大減小，重量也大為減輕。同樣散熱條件和絕緣材料的永磁同步電動機比三相異步電動機功率密度大2倍以上。在寸土如金的大城市，設(shè)備的占地面積對成本影響也逐漸被用戶所意識。
（4）轉(zhuǎn)子結(jié)構(gòu)大大簡化，便于維護(hù)，提高了運行的穩(wěn)定性。
交流永磁伺服電機，其轉(zhuǎn)子上的磁鋼與鐵心通常采用高溫膠粘接在一起，膠水固化時間一般比較長，增加了生產(chǎn)周期和成本，并且電機在運轉(zhuǎn)過程中，磁鋼在溫度變化、沖擊力等的反復(fù)作用下，有變形乃至脫落的風(fēng)險。為解決定這一技術(shù)難題，本公司研制的CM500系列重載型永磁同步電動機，將磁瓦膠粘工藝改為由不銹鋼套機械緊固的方式，如圖2所示，完全消除了磁鋼松脫的風(fēng)險。本項創(chuàng)新應(yīng)用技術(shù)已申請為專利，是電機轉(zhuǎn)子技術(shù)的一大進(jìn)步。
a) 正面
b) 測面
圖2 永磁同步電動機轉(zhuǎn)子組件結(jié)構(gòu)
三相異步電動機由于要設(shè)計較高的功率因素，就必需把定轉(zhuǎn)子間的氣隙做的很小，同時氣隙的均勻性對電機的安全運行和振動噪聲也至關(guān)重要，對此異步電動機對零部件的形位公差和裝配同心度的要求就相對嚴(yán)格，對軸承游隙選擇的自由度也比較少，較大機座的異步電機通常使用油浴潤滑方式的軸承，必需在規(guī)定的工作時間內(nèi)加注潤滑油，油腔漏油或加注不及時都會加速軸承失效，在三相異步電動機維修中，軸承的維護(hù)占了很大的比例。另外由于三相異步電動機轉(zhuǎn)子有感應(yīng)電流的存在，軸承的電腐蝕問題也在近幾年被很多研究者所關(guān)注，永磁同步電動機則不存在此類問題。永磁同步電動機由于氣隙較大，以上異步電動機氣隙小而引起的相關(guān)問題在同步電動機上表現(xiàn)的并不明顯，同時永磁同步電動機的軸承采用帶防塵蓋的脂潤滑軸承，軸承在出廠時已封入了適量的優(yōu)質(zhì)潤滑脂，可終生免維護(hù)。
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