矿用变频器中的漏电保护技术分析  

Analysis of Leakage Protection Technology in Mining Frequency Converters

作　　者：林燕霞[1] LIN Yanxia(Changzhi Vocational and Technical College,Shanxi 046000,China)

机构地区：[1]长治职业技术学院,山西046000

出　　处：《集成电路应用》2023年第12期122-123,共2页Application of IC

摘　　要：阐述变频器工作原理和主电路结构,变频器漏电流产生原因,探讨影响漏电流大小的因素,煤矿对漏电保护的要求,分析漏电保护方法有附加直流电源检测、零序电流保护法、零序功率方向法。This paper expounds the principle and main circuit structure of frequency converters,the causes of leakage current in frequency converters,explores the factors that affect the magnitude of leakage current,and analyzes the requirements of coal mines for leakage protection.The leakage protection methods include additional DC power supply detection,zero sequence current protection method,and zero sequence power direction method.

关 键 词：变频器 漏电流 零序电流保护 

分 类 号：TD611.5[矿业工程—矿山机电]