异步电机断条故障的启动电流小波诊断法（完整版）实用资料(可以直接使用，可编辑完整版实用资料，欢迎下载）异步电机断条故障的启动电流小波诊断法*张建文1,王春生2,张强1(1中国矿业大学信息与电气工程学院,徐州221008;2宁夏石嘴山供电局修试所,石嘴山753000摘要:为克服小波脊线在诊断异步电机断条故障过程中存在的数学定义复杂、迭代逼近运算量大等缺点,应用Morlet连续复值小波,多尺度地、中心频率等间隔地分解了实测的同型正常电机和有一根断条的故障电机启动电流信号,分析和比较了对应尺度下的频带能量后,找出了上述电机两种状态的信号能量差异;定义了频带能量比(RFBE的概念,得出断条故障电机的RFBE比良好状态的至少大2倍的定量判据,并据此提出了基于RFBE的电机断条故障诊断新方法。研究表明:该法不仅具有小波脊线方法的高灵敏度、不受负载波动影响,且诊断过程大为简化、不受噪声干扰影响、实用性更强。关键词:故障诊断;转子断条;异步电机;复值小波;频带能量;小波脊线中图分类号:TM3433文献标识码:A文章编号:10036520(200610002504WaveletTransformMethodforDiagnosingRotorBrokenbarFaultofAsynchronousMotorZHANGJianwen1,WANGChunsheng2,ZHANGQiang1(1.CollegeofInformation&ElectricalEngineeringofCUMT,Xuzhou221008,China;2.PowerSupplyBureauofShizuishanCity,Shizuishan753000,ChinaAbstract:Waveletridgeisaeffectiveandsensitivemethodfordiagnosingrotorbrokenbarfaultofasynchronousmotors,butithassuchdisadvantagesascomplexmathematicdefinition,greatcalculationquantityofiterativeimminentprocessandsoon.Inordertoavoidabovedisadvantagesofwaveletridge,anewdiagnosticmethodbasedonwaveletfrequencybandenergyisproposedinthispaper.Startupcurrentsignalsoftwosamemodelmotorswhoseconditionisdifferentwerepracticallymeasured,abovethesetwomotors,onemotor'srotorhasabrokenbar,anotherisingoodcondition.BymeansofMorletcontinuouscomplexwavelet,thesemeasuredcurrentsignalsarerespectivelydecomposedundermultipledifferentscales,meanwhileintervalsofcentralfrequenciescorrespondingtodecomposingscalesareuniform.Basedongeneraldefinitionofsignalenergy,frequencybandenergiesunderdifferentscalesarecalculated,analyzedandcompared,consequentlysignalenergy'sdifferenceofabovetwodifferentconditionmotorsisdiscovered.Theratiooffrequencybandenergy(RFBEisdefinedanditsrationcriterionispresented,thatis,RFBEofbrokenbarfaultismorethantwotimesofRFBEofgoodcondition.AnalyticalResultsofmeasuredsignalsalsoshowthattheRFBEisnotnearlyinterferedbynoise.NotonlyhasthisnewRFBEmethodthesuchadvantagesofwaveletridgeashighsensitiveness,noinfluencefromloadfluctuation,butalsoitsdiagnosticcourseis