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解(jie)決方(fang)案(an) Solutions
1
2018 - 10 - 09
點擊次數: 728
摘要:變(bian)(bian)(bian)(bian)頻(pin)(pin)(pin)調(diao)(diao)(diao)(diao)速(su)(su)以(yi)其(qi)優異(yi)的(de)調(diao)(diao)(diao)(diao)速(su)(su)和起(qi)制(zhi)動(dong)性(xing)能、高效(xiao)率(lv)(lv)、高功率(lv)(lv)因(yin)數(shu)和節能效(xiao)果,被廣泛應用(yong)。在(zai)(zai)供水(shui)工(gong)業(ye)上(shang)使用(yong)新科瑞(rui)中壓變(bian)(bian)(bian)(bian)頻(pin)(pin)(pin)器,可(ke)以(yi)有效(xiao)延長(chang)電(dian)(dian)(dian)(dian)(dian)(dian)機壽(shou)命,減少對水(shui)路的(de)沖(chong)擊(ji)。　　1 、引言　　水(shui)廠的(de)工(gong)業(ye)泵(beng)房,水(shui)泵(beng)開后一直處于(yu)滿(man)負荷狀(zhuang)態,而用(yong)水(shui)量(liang)(liang)(liang)是(shi)隨生產而時(shi)刻變(bian)(bian)(bian)(bian)化。因(yin)此,必(bi)(bi)須頻(pin)(pin)(pin)繁(fan)開停(ting)泵(beng)或(huo)采用(yong)擋板、閥門(men)等方(fang)法調(diao)(diao)(diao)(diao)節供水(shui)量(liang)(liang)(liang)。這必(bi)(bi)將對水(shui)泵(beng)、電(dian)(dian)(dian)(dian)(dian)(dian)機造(zao)成(cheng)機械沖(chong)擊(ji),既減少它們的(de)使用(yong)壽(shou)命,也(ye)造(zao)成(cheng)電(dian)(dian)(dian)(dian)(dian)(dian)能的(de)浪費(fei)。采用(yong)變(bian)(bian)(bian)(bian)頻(pin)(pin)(pin)調(diao)(diao)(diao)(diao)速(su)(su)既節能、延長(chang)設(she)備使用(yong)壽(shou)命,又能很好(hao)滿(man)足要求(qiu)。　　2、變(bian)(bian)(bian)(bian)頻(pin)(pin)(pin)調(diao)(diao)(diao)(diao)速(su)(su)簡(jian)介　　一個交流(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)動(dong)機的(de)變(bian)(bian)(bian)(bian)頻(pin)(pin)(pin)調(diao)(diao)(diao)(diao)速(su)(su)系統由變(bian)(bian)(bian)(bian)頻(pin)(pin)(pin)調(diao)(diao)(diao)(diao)速(su)(su)驅動(dong)器、交流(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)動(dong)機和控(kong)(kong)(kong)制(zhi)器組成(cheng)。其(qi)轉(zhuan)(zhuan)速(su)(su)n與(yu)電(dian)(dian)(dian)(dian)(dian)(dian)源頻(pin)(pin)(pin)率(lv)(lv)f、轉(zhuan)(zhuan)差率(lv)(lv)s、電(dian)(dian)(dian)(dian)(dian)(dian)機極對數(shu)p有如下關系:　　變(bian)(bian)(bian)(bian)頻(pin)(pin)(pin)調(diao)(diao)(diao)(diao)速(su)(su)通(tong)過改變(bian)(bian)(bian)(bian)電(dian)(dian)(dian)(dian)(dian)(dian)源頻(pin)(pin)(pin)率(lv)(lv)f的(de)方(fang)式(shi)來改變(bian)(bian)(bian)(bian)電(dian)(dian)(dian)(dian)(dian)(dian)動(dong)機轉(zhuan)(zhuan)速(su)(su)的(de)。 一般(ban)要求(qiu)主(zhu)磁(ci)通(tong)保持不(bu)變(bian)(bian)(bian)(bian),這樣在(zai)(zai)調(diao)(diao)(diao)(diao)速(su)(su)范圍內(nei)可(ke)保持轉(zhuan)(zhuan)矩不(bu)變(bian)(bian)(bian)(bian),根據公式(shi): U1≈E1=4.44fN1kΦ為(wei)保持主(zhu)磁(ci)通(tong)Φ不(bu)變(bian)(bian)(bian)(bian),在(zai)(zai)改變(bian)(bian)(bian)(bian)f調(diao)(diao)(diao)(diao)速(su)(su)的(de)同時(shi),還必(bi)(bi)須改變(bian)(bian)(bian)(bian)電(dian)(dian)(dian)(dian)(dian)(dian)壓U1,并且(qie)保持U1/f比值不(bu)變(bian)(bian)(bian)(bian)。目前變(bian)(bian)(bian)(bian)壓變(bian)(bian)(bian)(bian)頻(pin)(pin)(pin)技(ji)術已經被更(geng)為(wei)先進的(de)矢量(liang)(liang)(liang)控(kong)(kong)(kong)制(zhi)所取代,是(shi)將異(yi)步電(dian)(dian)(dian)(dian)(dian)(dian)動(dong)機的(de)定(ding)子電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)分(fen)(fen)為(wei)產生磁(ci)場的(de)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)分(fen)(fen)量(liang)(liang)(liang)(勵(li)磁(ci)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu))和與(yu)其(qi)垂直的(de)產生轉(zhuan)(zhuan)矩的(de)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)分(fen)(fen)量(liang)(liang)(liang)(轉(zhuan)(zhuan)矩電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)),并加以(yi)控(kong)(kong)(kong)制(zhi)。在(zai)(zai)這種(zhong)控(kong)(kong)(kong)制(zhi)方(fang)式(shi)中,必(bi)(bi)須同時(shi)控(kong)(kong)(kong)制(zhi)異(yi)步電(dian)(dian)(dian)(dian)(dian)(dian)動(dong)機定(ding)子電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)的(de)幅值和相位(wei),即控(kong)(kong)(kong)制(zhi)定(ding)子電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)矢量(liang)(liang)(liang),故稱(cheng)為(wei)矢量(liang)(liang)(liang)控(kong)(kong)(kong)制(zhi)方(fang)式(shi)。對于(yu)水(shui)泵(beng),由于(yu)流(liu)(liu)量(liang)(liang)(liang)與(yu)轉(zhuan)(zhuan)速(su)(su)的(de)一次(ci)(ci)(ci)方(fang)成(cheng)正比,扭矩與(yu)轉(zhuan)(zhuan)速(su)(su)二次(ci)(ci)(ci)方(fang)成(cheng)正比,而泵(beng)的(de)功率(lv)(lv)則與(yu)轉(zhuan)(zhuan)速(su)(su)的(de)三次(ci)(ci)(ci)方(fang)成(cheng)正比。用(yong)n、N分(fen)(fen)別表示...
2
2018 - 09 - 26
點擊(ji)次數: 832
變(bian)頻(pin)(pin)(pin)器(qi)正(zheng)(zheng)向著低(di)噪(zao)聲、高(gao)性能(neng)(neng)、高(gao)可靠性方向發展，通用(yong)(yong)(yong)變(bian)頻(pin)(pin)(pin)器(qi)以其(qi)(qi)調(diao)速范圍寬、調(diao)速精(jing)度高(gao)、動(dong)態響應(ying)(ying)快(kuai)、效率(lv)高(gao)及操作方便等優點，在節(jie)約(yue)能(neng)(neng)源，控(kong)(kong)制工業(ye)(ye)(ye)(ye)(ye)生(sheng)產(chan)過程，提高(gao)企業(ye)(ye)(ye)(ye)(ye)自動(dong)化生(sheng)產(chan)水(shui)(shui)(shui)(shui)平等方面取得了良好的(de)(de)(de)(de)效果。隨著通用(yong)(yong)(yong)變(bian)頻(pin)(pin)(pin)器(qi)的(de)(de)(de)(de)廣(guang)泛應(ying)(ying)用(yong)(yong)(yong)，中(zhong)(zhong)壓(ya)變(bian)頻(pin)(pin)(pin)器(qi)正(zheng)(zheng)在得到(dao)推廣(guang)和(he)應(ying)(ying)用(yong)(yong)(yong)。　　中(zhong)(zhong)壓(ya)變(bian)頻(pin)(pin)(pin)器(qi)主要(yao)(yao)運用(yong)(yong)(yong)于工業(ye)(ye)(ye)(ye)(ye)場合，因其(qi)(qi)突(tu)出的(de)(de)(de)(de)控(kong)(kong)制調(diao)節(jie)能(neng)(neng)力(li)，在為企業(ye)(ye)(ye)(ye)(ye)節(jie)省大(da)量勞動(dong)力(li)的(de)(de)(de)(de)同時，還能(neng)(neng)大(da)幅度節(jie)約(yue)電(dian)能(neng)(neng)，降低(di)企業(ye)(ye)(ye)(ye)(ye)生(sheng)產(chan)成本，提高(gao)資源利用(yong)(yong)(yong)率(lv)，所以690v中(zhong)(zhong)壓(ya)變(bian)頻(pin)(pin)(pin)器(qi)的(de)(de)(de)(de)應(ying)(ying)用(yong)(yong)(yong)領(ling)域(yu)將(jiang)會越(yue)來越(yue)廣(guang)，為企業(ye)(ye)(ye)(ye)(ye)，為社(she)會創(chuang)造更(geng)(geng)大(da)的(de)(de)(de)(de)經濟(ji)效益。下(xia)面對深圳市(shi)新(xin)科瑞電(dian)氣技術(shu)有限(xian)公(gong)司生(sheng)產(chan)的(de)(de)(de)(de)690v中(zhong)(zhong)壓(ya)變(bian)頻(pin)(pin)(pin)器(qi)的(de)(de)(de)(de)應(ying)(ying)用(yong)(yong)(yong)領(ling)域(yu)作簡要(yao)(yao)概(gai)括：　　一、石化行業(ye)(ye)(ye)(ye)(ye)：輸油泵(beng)(beng)(beng)、電(dian)潛(qian)泵(beng)(beng)(beng)、注(zhu)水(shui)(shui)(shui)(shui)泵(beng)(beng)(beng)、鹵水(shui)(shui)(shui)(shui)泵(beng)(beng)(beng)、管道泵(beng)(beng)(beng)、空壓(ya)機(ji)等;　　二、造紙行業(ye)(ye)(ye)(ye)(ye)：鍋爐給水(shui)(shui)(shui)(shui)泵(beng)(beng)(beng)、引(yin)水(shui)(shui)(shui)(shui)泵(beng)(beng)(beng)、打漿機(ji)、主軸傳(chuan)動(dong);　　三、礦(kuang)山及冶金行業(ye)(ye)(ye)(ye)(ye)：傳(chuan)送帶(dai)、漿泵(beng)(beng)(beng)、排風(feng)(feng)(feng)扇、除鱗(lin)泵(beng)(beng)(beng)、包裝車間(jian)風(feng)(feng)(feng)機(ji)、循(xun)環(huan)供水(shui)(shui)(shui)(shui)泵(beng)(beng)(beng);　　四、水(shui)(shui)(shui)(shui)泥生(sheng)產(chan)行業(ye)(ye)(ye)(ye)(ye)：窯(yao)(yao)主傳(chuan)動(dong)、高(gao)溫(wen)風(feng)(feng)(feng)機(ji)、吸塵(chen)器(qi)風(feng)(feng)(feng)機(ji)、原料磨風(feng)(feng)(feng)機(ji)、窯(yao)(yao)風(feng)(feng)(feng)機(ji);　　五(wu)、發電(dian)廠;送風(feng)(feng)(feng)機(ji)、引(yin)風(feng)(feng)(feng)機(ji)、凝結水(shui)(shui)(shui)(shui)泵(beng)(beng)(beng)、循(xun)環(huan)水(shui)(shui)(shui)(shui)泵(beng)(beng)(beng)、鍋爐給水(shui)(shui)(shui)(shui)泵(beng)(beng)(beng)、灰漿泵(beng)(beng)(beng);　　六、水(shui)(shui)(shui)(shui)及污水(shui)(shui)(shui)(shui)處理行業(ye)(ye)(ye)(ye)(ye)：給排水(shui)(shui)(shui)(shui)泵(beng)(beng)(beng)、污水(shui)(shui)(shui)(shui)泵(beng)(beng)(beng)、生(sheng)物處理塔泵(beng)(beng)(beng)、水(shui)(shui)(shui)(shui)處理泵(beng)(beng)(beng)、凈水(shui)(shui)(shui)(shui)泵(beng)(beng)(beng)等。　　以上設備大(da)多為工頻(pin)(pin)(pin)電(dian)機(ji)驅動(dong)，且(qie)空載(zai)運行時間(jian)較長，而690v中(zhong)(zhong)壓(ya)變(bian)頻(pin)(pin)(pin)器(qi)的(de)(de)(de)(de)引(yin)用(yong)(yong)(yong)徹底解(jie)決了這一問題，不(bu)僅電(dian)機(ji)電(dian)壓(ya)、頻(pin)(pin)(pin)率(lv)可調(diao)，還能(neng)(neng)實現控(kong)(kong)制系統的(de)(de)(de)(de)閉環(huan)控(kong)(kong)制，提高(gao)了生(sheng)產(chan)效率(lv)和(he)精(jing)度，為企業(ye)(ye)(ye)(ye)(ye)創(chuang)造更(geng)(geng)大(da)的(de)(de)(de)(de)價值(zhi)。　　下(xia)圖是新(xin)科瑞中(zhong)(zhong)壓(ya)變(bian)頻(pin)(pin)(pin)...
3
2014 - 07 - 01
點擊次(ci)數: 1053
摘  要(yao)：相對于傳統的(de)(de)水(shui)(shui)(shui)(shui)(shui)(shui)箱和水(shui)(shui)(shui)(shui)(shui)(shui)塔(ta)的(de)(de)供(gong)(gong)(gong)(gong)水(shui)(shui)(shui)(shui)(shui)(shui)，變(bian)(bian)(bian)頻(pin)恒(heng)壓供(gong)(gong)(gong)(gong)水(shui)(shui)(shui)(shui)(shui)(shui)具有眾多的(de)(de)節電(dian)(dian)節水(shui)(shui)(shui)(shui)(shui)(shui)、不對水(shui)(shui)(shui)(shui)(shui)(shui)資(zi)源造成污染等(deng)優點。本文以某供(gong)(gong)(gong)(gong)水(shui)(shui)(shui)(shui)(shui)(shui)廠用變(bian)(bian)(bian)頻(pin)器一拖多臺泵(beng)的(de)(de)方(fang)式實現(xian)恒(heng)壓供(gong)(gong)(gong)(gong)水(shui)(shui)(shui)(shui)(shui)(shui)為(wei)例，詳細介紹(shao)了新(xin)科瑞(rui)C500系(xi)列變(bian)(bian)(bian)頻(pin)器及其在(zai)恒(heng)壓供(gong)(gong)(gong)(gong)水(shui)(shui)(shui)(shui)(shui)(shui)系(xi)統中的(de)(de)應用。 一、引言(yan)       供(gong)(gong)(gong)(gong)水(shui)(shui)(shui)(shui)(shui)(shui)自(zi)(zi)動(dong)(dong)控制系(xi)統工(gong)作時，設備通過(guo)(guo)安裝在(zai)供(gong)(gong)(gong)(gong)水(shui)(shui)(shui)(shui)(shui)(shui)管(guan)網(wang)上(shang)的(de)(de)高靈敏度壓力(li)傳感器來檢測供(gong)(gong)(gong)(gong)水(shui)(shui)(shui)(shui)(shui)(shui)管(guan)網(wang)在(zai)用水(shui)(shui)(shui)(shui)(shui)(shui)量變(bian)(bian)(bian)化時的(de)(de)壓力(li)變(bian)(bian)(bian)化，不斷向變(bian)(bian)(bian)頻(pin)器傳輸變(bian)(bian)(bian)化的(de)(de)信號(hao)，經(jing)過(guo)(guo)微(wei)電(dian)(dian)腦判斷運算(suan)并與設定的(de)(de)壓力(li)比(bi)較后，向控制器發出(chu)改(gai)(gai)變(bian)(bian)(bian)頻(pin)率的(de)(de)指令，控制器通過(guo)(guo)改(gai)(gai)變(bian)(bian)(bian)頻(pin)率來改(gai)(gai)變(bian)(bian)(bian)水(shui)(shui)(shui)(shui)(shui)(shui)泵(beng)電(dian)(dian)機的(de)(de)轉速與啟用臺數，自(zi)(zi)動(dong)(dong)調(diao)節峰谷用水(shui)(shui)(shui)(shui)(shui)(shui)量，保證供(gong)(gong)(gong)(gong)水(shui)(shui)(shui)(shui)(shui)(shui)管(guan)網(wang)壓力(li)恒(heng)定，以滿足用戶用水(shui)(shui)(shui)(shui)(shui)(shui)的(de)(de)需求。C500恒(heng)壓供(gong)(gong)(gong)(gong)水(shui)(shui)(shui)(shui)(shui)(shui)原理(li)圖如下：                                           ...
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