對于現在(zai)各個工作(zuo)場合中(zhong)使用量非常廣泛的防爆變(bian)頻(pin)(pin)(pin)(pin)器(qi)(qi)你有(you)(you)多(duo)少(shao)了(le)解?防爆變(bian)頻(pin)(pin)(pin)(pin)器(qi)(qi)都(dou)裝(zhuang)有(you)(you)變(bian)頻(pin)(pin)(pin)(pin)器(qi)(qi)來調節(jie)轉速，變(bian)頻(pin)(pin)(pin)(pin)器(qi)(qi)對防爆變(bian)頻(pin)(pin)(pin)(pin)器(qi)(qi)起到 的保護(hu)作(zuo)用，如(ru)過載(zai)、缺相等原因都(dou)可以相對避(bi)免，但是也(ye)(ye)不是裝(zhuang)了(le)變(bian)頻(pin)(pin)(pin)(pin)器(qi)(qi)就不會(hui)燒(shao)毀(hui)電機，如(ru)果過流保護(hu)設置(zhi)過大，電機長期在(zai)很高的電流以上(shang)運行(xing)，就容(rong)易燒(shao)毀(hui)電機，還有(you)(you)頻(pin)(pin)(pin)(pin)繁啟停，電流過高，也(ye)(ye)容(rong)易燒(shao)毀(hui)電機。所以，不是有(you)(you)了(le)變(bian)頻(pin)(pin)(pin)(pin)器(qi)(qi)就能夠(gou)避(bi)免所有(you)(you)的危險，還需要正(zheng)確設置(zhi)參數，不能盲目加大過載(zai)系數，對電機多(duo)觀察，注意(yi)負載(zai)變(bian)化(hua)， 這樣操作(zuo)才是正(zheng)確使用防爆變(bian)頻(pin)(pin)(pin)(pin)器(qi)(qi)的方(fang)法。

　　防(fang)爆(bao)變頻(pin)器(qi)的(de)(de)(de)燒變頻(pin)電(dian)(dian)(dian)機一般是會(hui)存在(zai)(zai)匝間(jian)短路(lu)(lu)(lu)、相間(jian)斷(duan)路(lu)(lu)(lu)、對地短路(lu)(lu)(lu)等現(xian)象，在(zai)(zai)工(gong)頻(pin)供(gong)電(dian)(dian)(dian)下(xia)，防(fang)爆(bao)電(dian)(dian)(dian)機繞(rao)(rao)(rao)(rao)組(zu)接收(shou)的(de)(de)(de)電(dian)(dian)(dian)壓是三相50Hz的(de)(de)(de)正弦波電(dian)(dian)(dian)壓，繞(rao)(rao)(rao)(rao)組(zu)產生的(de)(de)(de)感應電(dian)(dian)(dian)壓也較(jiao)低，線路(lu)(lu)(lu)中的(de)(de)(de)浪(lang)涌(yong)分量較(jiao)小。大(da)家要(yao)是說想要(yao)及時解決問題(ti)的(de)(de)(de)話(hua)， 要(yao)做到(dao)(dao)的(de)(de)(de)就是先(xian)了解原因，這樣才能夠做到(dao)(dao)對癥下(xia)藥。而在(zai)(zai)防(fang)爆(bao)變頻(pin)器(qi)供(gong)電(dian)(dian)(dian)下(xia)，變頻(pin)器(qi)逆變器(qi)將直流電(dian)(dian)(dian)轉(zhuan)換成(cheng)三相交流電(dian)(dian)(dian)壓，通(tong)過控制(zhi)六(liu)個橋臂的(de)(de)(de)開(kai)關元件導通(tong)、斷(duan)，來實現(xian)三相交流電(dian)(dian)(dian)壓輸出，頻(pin)率(lv)約(yue)為(wei)幾千(qian)(qian)到(dao)(dao)十(shi)幾千(qian)(qian)赫茲。這時候防(fang)爆(bao)變頻(pin)器(qi)繞(rao)(rao)(rao)(rao)組(zu)接受到(dao)(dao)的(de)(de)(de)電(dian)(dian)(dian)壓沖(chong)擊較(jiao)大(da)，電(dian)(dian)(dian)壓變化(hua)率(lv)增(zeng)(zeng)加，使得電(dian)(dian)(dian)機繞(rao)(rao)(rao)(rao)組(zu)匝間(jian)電(dian)(dian)(dian)壓變化(hua)率(lv)很(hen)高，繞(rao)(rao)(rao)(rao)組(zu)電(dian)(dian)(dian)壓分布變得很(hen)不均(jun)勻，使電(dian)(dian)(dian)機匝間(jian)絕緣承受較(jiao)大(da)考驗，如電(dian)(dian)(dian)機繞(rao)(rao)(rao)(rao)組(zu)短路(lu)(lu)(lu)增(zeng)(zeng)加，電(dian)(dian)(dian)機故障率(lv)增(zeng)(zeng)加。

　　另(ling)外(wai)還有一(yi)種(zhong)情況，把普(pu)通防(fang)爆電(dian)(dian)(dian)機(ji)(ji)(ji)(ji)當(dang)做變(bian)頻防(fang)爆電(dian)(dian)(dian)機(ji)(ji)(ji)(ji)，由于普(pu)通電(dian)(dian)(dian)機(ji)(ji)(ji)(ji)風扇是跟電(dian)(dian)(dian)機(ji)(ji)(ji)(ji)軸是一(yi)起(qi)的，當(dang)電(dian)(dian)(dian)機(ji)(ji)(ji)(ji)長期在低(di)(di)頻運(yun)行時(shi)，電(dian)(dian)(dian)機(ji)(ji)(ji)(ji)轉速(su)低(di)(di)，跟電(dian)(dian)(dian)機(ji)(ji)(ji)(ji)軸一(yi)起(qi)的風扇也會轉速(su)過低(di)(di)，引起(qi)電(dian)(dian)(dian)機(ji)(ji)(ji)(ji)散熱不足，嚴重時(shi)甚至會燒毀電(dian)(dian)(dian)機(ji)(ji)(ji)(ji)。這些都是不正(zheng)確(que)使用防(fang)爆變(bian)頻器的主要原因，大(da)家在之后(hou)的使用中(zhong)需要及時(shi)進行改(gai)正(zheng)，這樣才能夠更(geng) 發(fa)揮防(fang)爆變(bian)頻器的作(zuo)用。