基于S7-300的挖掘机无功补偿系统  

A New Reactive Power Compensation System of Excavator Based on S7-300PLC

作　　者：廖志军[1] 

机构地区：[1]江西铜业集团公司德兴铜矿,江西德兴334224

出　　处：《铜业工程》2011年第4期47-51,78,共6页Copper Engineering

摘　　要：2300XP型矿用挖掘机,其无功补偿控制系统采用2组副边就地补偿方式,控制电路由集成运放组成其温漂大,精度差,故障率高。为此将其改造成基于S7-300型PLC为主的数字控制,给出了具体的硬件构成,软件程序。从根本上杜绝了故障源,完全适应挖掘机现场作业,经实测功率因数在0.9以上,控制精确,投资少,效果显著。The reactive power compensation control system of 2300XP mining excavator uses a 2-set secondary compensation group.The control circuit consists of integrated operational amplifier,with features of large temperature drift,poor accuracy,high failure rate.Therefore,it＇s transformed into a model based on S7-300 PLC digital control which has specific hardware configuration and software program.It fundamentally eliminates the source of problem,and fully meets the need of excavator working at site.It＇s measured that power factor is above 0.9 and it has other advantages like accurate control,less investment,and remarkable effect.

关 键 词：挖掘机 晶闸管 无功补偿 集成运放 PLC CPLD 循环投切 

分 类 号：TD854.2[矿业工程—金属矿开采]