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395B 型电动挖掘机是美国 BE 公司生产的斗容为32 m~3的大型单斗挖掘机,目前在我国准格尔露天矿、平朔露天矿、鞍山齐拉山铁矿运行达十几年之久。它的各部驱动全部采用西门子公司的矢量控制变频调速系统。该系统的功率部分是用 GTO 作为开关元件组成脉冲宽度调制逆变器。运行情况表明,系统运行时,有时会出现频繁地烧 GTO 及逆变器电源保险或只频繁地烧逆变器电源保险故障.如果没有一个具体可行的解决方法,频繁程度有时可能高达每班数次之
Model 395B electric excavator is a large single bucket excavator with a bucket capacity of 32 m ~ 3 produced by BE Company in the United States. At present, there are over ten years of operation in China’s Zhungeer open pit mine, Pingshuo open pit mine and Anshan Qilashan iron mine as long as. Its various ministries drive all adopt the vector control frequency conversion velocity modulation system of Siemens Company. The power part of the system is the use of GTO as a switching element composed of pulse width modulation inverter. Operating conditions indicate that there are times when systems operate frequently with GTO and inverter mains fuses or with frequent inverter mains faults only and, if there is not a practical solution, the frequency can sometimes be as high as the number of classes per shift Second