產(chǎn)品詳情
矢量控制變頻調(diào)速的做法是將異步電動(dòng)機(jī)在三相坐標(biāo)系下的定子電流Ia、Ib、Ic、通過三相-二相變換,等效成兩相靜止坐標(biāo)系下的交流電流Ia1Ib1,再通過按轉(zhuǎn)子磁場定向變換,等效成同步坐標(biāo)系下的直流電流Im1、It1(Im1相當(dāng)于直流電動(dòng)機(jī)的勵(lì)磁電流;It1相當(dāng)于與轉(zhuǎn)矩成正比的電樞電流),然后模仿直流電動(dòng)機(jī)的控制,求得直流電動(dòng)機(jī)的控制量,經(jīng)過相應(yīng)的坐標(biāo)反變換,實(shí)現(xiàn)對(duì)異步電動(dòng)機(jī)的控制。其實(shí)質(zhì)是將交流電動(dòng)機(jī)等效為直流電動(dòng)機(jī),分別對(duì)速度,磁場兩個(gè)分量進(jìn)行控制。通過控制轉(zhuǎn)子磁鏈,然后分解定子電流而轉(zhuǎn)矩和磁場兩個(gè)分量,經(jīng)坐標(biāo)變換,實(shí)現(xiàn)正交或解耦控制。矢量控制的提出具有劃時(shí)代的意義。然而在實(shí)際應(yīng)用中,由于轉(zhuǎn)子磁鏈難以準(zhǔn)確觀測,特性受電動(dòng)機(jī)參數(shù)的影響較大,且在等效直流電動(dòng)機(jī)控制中所用矢量變換較復(fù)雜,使得實(shí)際的控制效果難以達(dá)到分析的結(jié)果。
【公 司】: 福建鴻飛達(dá)自動(dòng)化科技有限公司【主 營】: AB(羅克韋爾)PLC全系列、ABB機(jī)器人備件、施耐德140/TSX、西門子6SN/6FC、伺服全套等
【價(jià) 格】: 電議
【發(fā)布人】: 程先生
【電 話】: 15306977024 13625073704
【所在地】: 福建 - 福州
【坐 機(jī)】: 0591-83532940
【Q Q】: 2851617309
【傳 真】: 0591-88263940
【郵 箱】: 2851617309@qq.com
福建省福州市高新區(qū)新保路正榮財(cái)富中心SOHO B幢8樓
產(chǎn)品價(jià)格以電話或者QQ詢價(jià)為準(zhǔn),發(fā)布價(jià)格不做參考,圖片也一樣
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