對于(yu)現(xian)在各個工作場(chang)合中使(shi)用量非常廣(guang)泛的(de)(de)防(fang)爆變(bian)頻(pin)(pin)器(qi)(qi)你有(you)(you)多少(shao)了解?防(fang)爆變(bian)頻(pin)(pin)器(qi)(qi)都裝有(you)(you)變(bian)頻(pin)(pin)器(qi)(qi)來調節轉速，變(bian)頻(pin)(pin)器(qi)(qi)對防(fang)爆變(bian)頻(pin)(pin)器(qi)(qi)起到 的(de)(de)保護作用，如(ru)過(guo)(guo)載、缺相(xiang)等原因(yin)都可以相(xiang)對避(bi)免，但是也(ye)不是裝了變(bian)頻(pin)(pin)器(qi)(qi)就不會燒毀電(dian)(dian)(dian)機，如(ru)果過(guo)(guo)流(liu)保護設(she)置過(guo)(guo)大，電(dian)(dian)(dian)機長期(qi)在很高(gao)的(de)(de)電(dian)(dian)(dian)流(liu)以上運行(xing)，就容易(yi)燒毀電(dian)(dian)(dian)機，還(huan)有(you)(you)頻(pin)(pin)繁(fan)啟停，電(dian)(dian)(dian)流(liu)過(guo)(guo)高(gao)，也(ye)容易(yi)燒毀電(dian)(dian)(dian)機。所(suo)以，不是有(you)(you)了變(bian)頻(pin)(pin)器(qi)(qi)就能夠(gou)避(bi)免所(suo)有(you)(you)的(de)(de)危險，還(huan)需要正確(que)(que)設(she)置參數，不能盲目加大過(guo)(guo)載系(xi)數，對電(dian)(dian)(dian)機多觀察，注意負載變(bian)化(hua)， 這樣(yang)操作才是正確(que)(que)使(shi)用防(fang)爆變(bian)頻(pin)(pin)器(qi)(qi)的(de)(de)方法。

　　防(fang)(fang)爆(bao)變(bian)(bian)頻(pin)器(qi)(qi)的(de)燒變(bian)(bian)頻(pin)電(dian)(dian)(dian)(dian)(dian)機一般(ban)是(shi)會存在匝(za)間(jian)(jian)短路、相(xiang)(xiang)間(jian)(jian)斷(duan)路、對地短路等現象，在工頻(pin)供(gong)電(dian)(dian)(dian)(dian)(dian)下，防(fang)(fang)爆(bao)電(dian)(dian)(dian)(dian)(dian)機繞(rao)組接收的(de)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)是(shi)三相(xiang)(xiang)50Hz的(de)正弦波(bo)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)，繞(rao)組產(chan)生的(de)感(gan)應電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)也較(jiao)低，線路中(zhong)的(de)浪涌(yong)分量較(jiao)小。大(da)家要(yao)是(shi)說(shuo)想要(yao)及時解(jie)決問題的(de)話， 要(yao)做到的(de)就是(shi)先了解(jie)原因，這樣才(cai)能(neng)夠做到對癥下藥(yao)。而在防(fang)(fang)爆(bao)變(bian)(bian)頻(pin)器(qi)(qi)供(gong)電(dian)(dian)(dian)(dian)(dian)下，變(bian)(bian)頻(pin)器(qi)(qi)逆變(bian)(bian)器(qi)(qi)將直(zhi)流(liu)電(dian)(dian)(dian)(dian)(dian)轉換成三相(xiang)(xiang)交流(liu)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)，通過控(kong)制六個(ge)橋臂的(de)開關元件導通、斷(duan)，來實現三相(xiang)(xiang)交流(liu)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)輸出，頻(pin)率(lv)約為(wei)幾千到十幾千赫茲(zi)。這時候防(fang)(fang)爆(bao)變(bian)(bian)頻(pin)器(qi)(qi)繞(rao)組接受(shou)到的(de)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)沖擊較(jiao)大(da)，電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)變(bian)(bian)化率(lv)增加(jia)，使得電(dian)(dian)(dian)(dian)(dian)機繞(rao)組匝(za)間(jian)(jian)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)變(bian)(bian)化率(lv)很高，繞(rao)組電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)分布變(bian)(bian)得很不(bu)均勻，使電(dian)(dian)(dian)(dian)(dian)機匝(za)間(jian)(jian)絕(jue)緣承受(shou)較(jiao)大(da)考(kao)驗，如電(dian)(dian)(dian)(dian)(dian)機繞(rao)組短路增加(jia)，電(dian)(dian)(dian)(dian)(dian)機故障(zhang)率(lv)增加(jia)。

　　另外還有(you)一種情況(kuang)，把普(pu)通(tong)防(fang)爆(bao)電(dian)機(ji)(ji)(ji)(ji)(ji)(ji)當(dang)做變(bian)頻(pin)防(fang)爆(bao)電(dian)機(ji)(ji)(ji)(ji)(ji)(ji)，由于普(pu)通(tong)電(dian)機(ji)(ji)(ji)(ji)(ji)(ji)風扇(shan)是跟(gen)電(dian)機(ji)(ji)(ji)(ji)(ji)(ji)軸(zhou)是一起(qi)的，當(dang)電(dian)機(ji)(ji)(ji)(ji)(ji)(ji)長期(qi)在低頻(pin)運行(xing)時(shi)，電(dian)機(ji)(ji)(ji)(ji)(ji)(ji)轉速低，跟(gen)電(dian)機(ji)(ji)(ji)(ji)(ji)(ji)軸(zhou)一起(qi)的風扇(shan)也(ye)會轉速過低，引起(qi)電(dian)機(ji)(ji)(ji)(ji)(ji)(ji)散熱不足，嚴(yan)重(zhong)時(shi)甚至會燒毀(hui)電(dian)機(ji)(ji)(ji)(ji)(ji)(ji)。這(zhe)(zhe)些(xie)都是不正確使用防(fang)爆(bao)變(bian)頻(pin)器(qi)的主(zhu)要(yao)原因(yin)，大(da)家(jia)在之后的使用中需要(yao)及時(shi)進行(xing)改正，這(zhe)(zhe)樣才能夠(gou)更 發(fa)揮防(fang)爆(bao)變(bian)頻(pin)器(qi)的作用。