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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。
6、今天發(fā)工資,給老公打電話:“親愛(ài)的,想吃點(diǎn)什么?我下班給你買(mǎi)回去?!崩瞎f(shuō):“哦,太棒了,我要吃烤鴨!”“恩,5塊錢(qián)以內(nèi)的,隨便挑!!”老公:“那給我來(lái)十份5塊錢(qián)的烤鴨。”
7、麗娜未能懷孕,便去教堂祈求。一年之后,她果然生了一子。一朋友得知后也想試試看,麗娜說(shuō):沒(méi)問(wèn)題,只要那個(gè)年輕的看門(mén)人還在。一點(diǎn)點(diǎn)語(yǔ)錄網(wǎng)
8、甲:昨晚你妻子大吵大鬧了?乙:是的,她在對(duì)狗發(fā)脾氣。甲:可憐的狗!我好像聽(tīng)到你妻子甚至威脅要拿走它進(jìn)門(mén)的鑰匙!
9、法官:你聲稱被告從你的絲襪里偷走了錢(qián)?女郎:是的,大人。法官:那你為什么不反抗?女郎紅著臉答:我不知道他是要偷我的錢(qián)。
10、一女子拿一張支票到銀行兌現(xiàn)。出納員:你能證明是你本人嗎?女子聽(tīng)了困惑不解,掏出一面鏡子照了照,答:沒(méi)錯(cuò)!是我本人!
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一年奔波,塵緣遇了誰(shuí);一句珍重,天涯別了誰(shuí);一點(diǎn)靈犀,憑欄憶了誰(shuí);一種相思,閑愁予了誰(shuí);一江明月,豪情酬了誰(shuí);一場(chǎng)冬雪,煙波忘了誰(shuí);一壺濁酒,相逢醉了誰(shuí);一世浮生,輕狂撩了誰(shuí);一封短信,才情念了誰(shuí);一番思量,誰(shuí)是誰(shuí)的誰(shuí) ;一枚圍脖,轉(zhuǎn)發(fā)回復(fù)誰(shuí).....