描述
逆變橋開(kāi)關(guān)器件IGBT短路會(huì)造成正負(fù)母線間打火;整流橋短路或逆變IGBT短路有可能造成進(jìn)線處打火或進(jìn)線保護(hù)用壓敏電阻損壞,因進(jìn)線也有電感,也會(huì)造成過(guò)電壓。
逆變橋開(kāi)關(guān)器件IGBT或整流橋燒毀造成自身炸裂,嚴(yán)重時(shí)殃及周圍器件,如燒毀驅(qū)動(dòng)電路板。
3、壓敏電阻問(wèn)題
壓敏電阻本來(lái)是用于進(jìn)線側(cè)吸收進(jìn)線過(guò)電壓的保護(hù)器件,但當(dāng)進(jìn)線側(cè)電壓持續(xù)較高,壓敏電阻性能有變化時(shí),有可能使壓敏電阻爆炸燒毀,同樣有可能殃及周圍器件和導(dǎo)線絕緣。
4、電解電容器漏液、爆炸、燃燒
電解電容質(zhì)量不好的表現(xiàn)有:漏液、漏電流大、損耗大、發(fā)熱、鼓包、炸裂、由炸裂引起燃燒、容量下降,內(nèi)阻及電感增加。對(duì)于濾波用電解電容器因電壓高、容量大,所儲(chǔ)存的能量大,容易造成漏液、爆炸、燃燒。電解液是可燃物,可造成燃燒事故。
因此要用質(zhì)量好的電解電容器,并在到達(dá)壽命前更換新的。
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主營(yíng):世界知名品牌的PLC、DCS系統(tǒng)備件模塊
①Allen-Bradley(美國(guó)AB)系列產(chǎn)品》
②Schneider(施耐德電氣)系列產(chǎn)品》
③General electric(通用電氣)系列產(chǎn)品》
④Westinghouse(美國(guó)西屋)系列產(chǎn)品》
⑤SIEMENS(西門(mén)子系列產(chǎn)品)》
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⑦estinghouse(西屋):OVATION系統(tǒng)、WDPF系統(tǒng)、MAX1000系統(tǒng)備件。
⑧Invensys Foxboro(??怂共_):I/A Series系統(tǒng),F(xiàn)BM(現(xiàn)場(chǎng)輸入/輸出模塊)
順序控制、梯形邏輯控制、事故追憶處理、數(shù)模轉(zhuǎn)換、輸入/輸出信號(hào)處理、數(shù)
據(jù)通信及處理等。Invensys Triconex:冗余容錯(cuò)控制系統(tǒng)、基于三重模件冗余(TMR)
結(jié)構(gòu)的zui現(xiàn)代化的容錯(cuò)控制器。
⑨Siemens(西門(mén)子):Siemens MOORE,Siemens Simatic C1,Siemens數(shù)控系統(tǒng)等。
⑩Bosch Rexroth(博世力士樂(lè)):Indramat,I/O模塊,PLC控制器,驅(qū)動(dòng)模塊等。
◆Motorola(摩托羅拉):MVME 162、MVME 167、MVME1772、MVME177等系列。
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