| 詳細(xì)參數(shù) |
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變頻器控制
低壓通用變頻輸出電壓為380～650V，輸出功率為0.75～400kW，工作為0～400Hz，它的主電路都采用交—直—交電路。其控制經(jīng)歷了以下四代。
1U/f=C的正弦脈寬調(diào)制(SPWM)控制
其特點(diǎn)是控制電路結(jié)構(gòu)簡(jiǎn)單、成本較低，機(jī)械特性硬度也，能夠一般傳動(dòng)的調(diào)速要求，已在產(chǎn)業(yè)的各個(gè)領(lǐng)域廣泛應(yīng)用。但是，這種控制在低頻時(shí)，由于輸出電壓較低，轉(zhuǎn)矩受定子電阻壓降的影響比較顯著，使輸出大轉(zhuǎn)矩減小。另外，其機(jī)械特性終究沒有直流電動(dòng)機(jī)硬，動(dòng)態(tài)轉(zhuǎn)矩能力和靜態(tài)調(diào)速性能都還不盡如人意，且性能不高、控制曲線會(huì)隨負(fù)載的變化而變化，轉(zhuǎn)矩響應(yīng)慢、電機(jī)轉(zhuǎn)矩利用率不高，低速時(shí)因定子電阻和逆變器死區(qū)效應(yīng)的存在而性能下降，性變差等。因此人們又研究出矢量控制變頻調(diào)速。
2電壓空間矢量(SVPWM)控制
它是以三相波形整體生成效果為前提，以逼近電機(jī)氣隙的圓形磁場(chǎng)軌跡為目的，一次生成三相調(diào)制波形，以內(nèi)切多邊形逼近圓的進(jìn)行控制的。經(jīng)實(shí)踐使用后又有所改進(jìn)，即引入補(bǔ)償，能速度控制的誤差；通過反饋估算磁鏈幅值，低速時(shí)定子電阻的影響；將輸出電壓、電流閉環(huán)，以動(dòng)態(tài)的精度和度。但控制電路環(huán)節(jié)較多，且沒有引入轉(zhuǎn)矩的調(diào)節(jié)，所以性能沒有根本。
【公 司】： 福建鴻飛達(dá)自動(dòng)化科技有限公司
【主 營(yíng)】： 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
AC20TB
AC20TB-E
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AD22-S1
AD35ID1
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AD51
AD51H
AD71
AD71S1
AD71-S1
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AD71S7
AD71TU
AD72
AD75M1
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AD75P1
AD75P1-S3
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AJ35PJ-8T3
AJ35PP-CNV
AJ35PP-CNV-GI
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AJ35PTF-128DT
AJ35PTF-24R
AJ35PTF-24S
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AJ35PTF-28AR
AJ35PTF-28AS
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AJ35PTF-32A
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AJ35TB1-16A
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AJ35TB1-16D
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AJ55TB32-4DR
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AJ55TB3-4D
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AJ61BT11
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