變頻電動機

優點

1、具備有啟動功能

2、采(cai)用電磁設計，減少了(le)定子和(he)轉(zhuan)子的(de)阻值(zhi)

3、適應不同工況條(tiao)件(jian)下的頻繁變速

4、在一定程度(du)上節能

區別

普通電(dian)機(ji)(ji)(ji)是根據(ju)市電(dian)的頻率和相應的功率設(she)計的，只有(you)在(zai)額定的情況下才能(neng)(neng)穩定運行。變頻電(dian)機(ji)(ji)(ji)就(jiu)不同了，變頻電(dian)機(ji)(ji)(ji)要克服低頻時的過熱與振動，所(suo)以變頻電(dian)機(ji)(ji)(ji)在(zai)設(she)計上要比(bi)普通電(dian)機(ji)(ji)(ji)性(xing)能(neng)(neng)要好一(yi)點。

電機(ji)(ji)變(bian)頻(pin)系(xi)統(tong)(tong)(tong)(tong)(tong)大(da)(da)都是(shi)采用的(de)(de)(de)恒(heng)V/F 控(kong)制系(xi)統(tong)(tong)(tong)(tong)(tong)，這(zhe)(zhe)個變(bian)頻(pin)控(kong)制系(xi)統(tong)(tong)(tong)(tong)(tong)的(de)(de)(de)特(te)點是(shi)結構(gou)簡單、制作便宜(yi)。這(zhe)(zhe)個系(xi)統(tong)(tong)(tong)(tong)(tong)被廣泛應(ying)用在風機(ji)(ji)等大(da)(da)型的(de)(de)(de)并且(qie)對于變(bian)頻(pin)系(xi)統(tong)(tong)(tong)(tong)(tong)的(de)(de)(de)動態(tai)(tai)性(xing)(xing)能(neng)要求(qiu)(qiu)不(bu)是(shi)很高(gao)的(de)(de)(de)地方。這(zhe)(zhe)個系(xi)統(tong)(tong)(tong)(tong)(tong)是(shi)一種(zhong)典型的(de)(de)(de)開環控(kong)制系(xi)統(tong)(tong)(tong)(tong)(tong)，這(zhe)(zhe)個系(xi)統(tong)(tong)(tong)(tong)(tong)能(neng)夠(gou)滿足大(da)(da)多(duo)數電機(ji)(ji)的(de)(de)(de)平滑的(de)(de)(de)變(bian)速(su)要求(qiu)(qiu)，但是(shi)對于動態(tai)(tai)和靜態(tai)(tai)的(de)(de)(de)調節性(xing)(xing)能(neng)都是(shi)有限的(de)(de)(de)，不(bu)能(neng)應(ying)用在對動態(tai)(tai)和靜態(tai)(tai)性(xing)(xing)能(neng)要求(qiu)(qiu)比(bi)較嚴格(ge)的(de)(de)(de)地方。為了實現動態(tai)(tai)和靜態(tai)(tai)調節的(de)(de)(de)高(gao)性(xing)(xing)能(neng)，我(wo)們(men)只能(neng)采用閉環控(kong)制系(xi)統(tong)(tong)(tong)(tong)(tong)來實現。

變頻電動機

防爆(bao)電(dian)動(dong)機(ji)是具(ju)有防爆(bao)性(xing)(xing)(xing)能(neng)(neng)(neng)(neng)的(de)(de)(de)(de)一類電(dian)動(dong)機(ji)。采(cai)取的(de)(de)(de)(de)措施有：把電(dian)氣(qi)設(she)備罩裝在一個外(wai)殼內，這種外(wai)殼具(ju)有能(neng)(neng)(neng)(neng)承受內部爆(bao)炸(zha)性(xing)(xing)(xing)混(hun)合(he)物的(de)(de)(de)(de)爆(bao)炸(zha)壓力，并能(neng)(neng)(neng)(neng)阻止內部的(de)(de)(de)(de)爆(bao)炸(zha)向外(wai)殼周圍爆(bao)炸(zha)性(xing)(xing)(xing)混(hun)合(he)物傳播的(de)(de)(de)(de)結構（隔爆(bao)型）；使(shi)電(dian)動(dong)機(ji)帶(dai)電(dian)零(ling)部件(jian)不(bu)可(ke)(ke)能(neng)(neng)(neng)(neng)產(chan)(chan)生足以(yi)引(yin)起爆(bao)炸(zha)危險的(de)(de)(de)(de)火花、電(dian)弧或(huo)(huo)危險溫(wen)度，或(huo)(huo)把可(ke)(ke)能(neng)(neng)(neng)(neng)產(chan)(chan)生這些(xie)現象(xiang)的(de)(de)(de)(de)帶(dai)電(dian)零(ling)部件(jian)與(yu)爆(bao)炸(zha)性(xing)(xing)(xing)混(hun)合(he)物隔斷開，使(shi)之不(bu)能(neng)(neng)(neng)(neng)相互接觸或(huo)(huo)達不(bu)到具(ju)有爆(bao)炸(zha)性(xing)(xing)(xing)危險的(de)(de)(de)(de)程度（增安型、通(tong)風型等）。在各類有爆(bao)炸(zha)性(xing)(xing)(xing)危險的(de)(de)(de)(de)環境中，正確地選用與(yu)各類設(she)備配套的(de)(de)(de)(de)防爆(bao)電(dian)動(dong)機(ji)是非常重要(yao)的(de)(de)(de)(de)。

其主要特點是：

⑴功率等(deng)級(ji)、安裝尺寸及轉速的對(dui)應(ying)關系(xi)與DIN42673一致，同(tong)時(shi)考慮(lv)到與YB系(xi)列

的(de)(de)繼承性和Y2系列的(de)(de)互換性，作(zuo)了(le)必(bi)要調整，更(geng)加有(you)效和適(shi)用。

⑵全系列采(cai)用F級絕緣，溫升按(an)B級考核。

⑶噪(zao)聲(sheng)限值(zhi)比YB系(xi)列(lie)低，接近(jin)YB系(xi)列(lie)的I級噪(zao)聲(sheng)，振動限值(zhi)與YB系(xi)列(lie)相當。

⑷外殼防護等級提(ti)高到IP55。

⑸全(quan)系列選用低噪(zao)聲深溝球軸承，機(ji)座中心高在(zai)180mm以上電機(ji)設注排油裝置。

⑹電機(ji)散熱(re)片有平行水平分布(bu)和輻射分布(bu)兩種，以平行水平分布(bu)為(wei)主。