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變頻調(diào)可平滑調(diào)速，調(diào)速范圍寬和節(jié)能等優(yōu)點(diǎn)在提升機(jī)上得到了廣泛的應(yīng)用，礦井提升機(jī)一般對(duì)變頻器有以下要求：

1．礦用電網(wǎng)波動(dòng)較大，變頻器在380V±20%能正常工作。

2．運(yùn)行平穩(wěn)，加減速平滑，S型曲線加速段，在加減速過(guò)程中可做到加速度連續(xù)，無(wú)撞擊感。

3．對(duì)回饋能量的處理方法：回饋制動(dòng)或能耗制動(dòng)。

4．變頻器在整個(gè)工作過(guò)程中提供所需要的力矩特性：

啟動(dòng)力矩大于2倍額定轉(zhuǎn)矩，尤其是當(dāng)?shù)V車(chē)停在井筒中間時(shí)，啟動(dòng)轉(zhuǎn)矩比額定轉(zhuǎn)矩大得多。低頻轉(zhuǎn)矩在3Hz時(shí)大于1.6倍額定轉(zhuǎn)矩。

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媽媽語(yǔ)重心長(zhǎng)的對(duì)女兒說(shuō)，“從小你就不聰明，累死累活的才考上個(gè)大學(xué)，畢業(yè)后還找不到工作，現(xiàn)在司機(jī)要男的、編輯要男的、會(huì)計(jì)要男的、連秘書(shū)也指定要男的，媽實(shí)在為你操碎了心啊。”女兒，“555555……。”媽媽一抹臉，堅(jiān)定的說(shuō)，“所以趁現(xiàn)在老婆還能是女人，趕緊上崗，要不然過(guò)兩年……”媽媽語(yǔ)重心長(zhǎng)的對(duì)女兒說(shuō)，“從小你就不聰明，累死累活的才考上個(gè)大學(xué)，畢業(yè)后還找不到工作，現(xiàn)在司機(jī)要男的、編輯要男的、會(huì)計(jì)要男的、連秘書(shū)也指定要男的，媽實(shí)在為你操碎了心啊?！迸畠?，“555555……?！眿寢屢荒?，堅(jiān)定的說(shuō)，“所以趁現(xiàn)在老婆還能是女人，趕緊上崗，要不然過(guò)兩年……”