MG200/500-AWD型交流电牵引采煤机变频器保护系统的改进  

MG200/500-AWD-AC Inverter Shearer Traction System to Improve Protection system

作　　者：王尔湘[1] 

机构地区：[1]平顶山工业职业技术学院,河南平顶山467001

出　　处：《煤矿机械》2009年第6期156-157,共2页Coal Mine Machinery

摘　　要：着重阐述了一种新的保护方法,就是在变频器的输入端加了一个空气开关,空气开关上并联压敏电阻(400 V电压选用865 kΩ压敏电阻),当有高压电时压敏电阻就会短路,空气开关迅速跳闸,保护了变频器,变频器损坏率大大降低,科学实用,效果显著。Focusing on a new method of protection is the increase transducer input of an air switch, air pressure -sensitive switch on the parallel resistance （400 V voltage varistor 865 kΩ optional） when there are high - voltage varistor time will be short - circuit air trip switch quickly to protect the inverter, the inverter greatly reduce the failure rate the scientific and practical results are obvious.

关 键 词：变频器 压敏电阻 空气开关 

分 类 号：TD421.6[矿业工程—矿山机电] TN773[电子电信—电路与系统]