1756-DNB
相關(guān)信息編輯 西門子再次進(jìn)行人事調(diào)整 任命新CFO 2013年9月23日，德國(guó)西門子股份公司再次進(jìn)行人事調(diào)整，RalfThomas被 任命為CFO(首席財(cái)務(wù)官)，且從即日起生效。與此同時(shí)，KlausHelmrich 被任命為西門子股份公司勞工董事，并將繼續(xù)擔(dān)任CTO(首席技術(shù)官)一職 。[5]
1756-DNB
聯(lián)系人：郭先生
聯(lián)系電話：18971415643《優(yōu)先》
座機(jī)：027-83238871
傳真：207-61537051
QQ：810334512《優(yōu)先》
1756-DNB
1采用伺服驅(qū)動(dòng)器—電動(dòng)機(jī)互饋對(duì)拖的測(cè)試平臺(tái) 這種測(cè)試系統(tǒng)由四部分組成，分別是三相PWM整流器、被測(cè)伺服驅(qū)動(dòng)器 —電動(dòng)機(jī)系統(tǒng)、負(fù)載伺服驅(qū)動(dòng)器—電動(dòng)機(jī)系統(tǒng)及上位機(jī)，其中兩臺(tái)電動(dòng) 機(jī)通過(guò)聯(lián)軸器互相連接。被測(cè)電動(dòng)機(jī)工作于電動(dòng)狀態(tài)，負(fù)載電動(dòng)機(jī)工作 于發(fā)電狀態(tài)。被測(cè)伺服驅(qū)動(dòng)器—電動(dòng)機(jī)系統(tǒng)工作于速度閉環(huán)狀態(tài)，用來(lái) 控制整個(gè)測(cè)試平臺(tái)的轉(zhuǎn)速，負(fù)載伺服驅(qū)動(dòng)器—電動(dòng)機(jī)系統(tǒng)工作于轉(zhuǎn)矩閉 環(huán)狀態(tài)，通過(guò)控制負(fù)載電動(dòng)機(jī)的電流來(lái)改變負(fù)載電動(dòng)機(jī)的轉(zhuǎn)矩大小，模 擬被測(cè)電機(jī)的負(fù)載變化，這樣互饋對(duì)拖測(cè)試平臺(tái)可以實(shí)現(xiàn)速度和轉(zhuǎn)矩的 靈活調(diào)節(jié)，完成各種試驗(yàn)功能測(cè)試。
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