永磁同步电机故障诊断分析英文材料
3676IEEETRANSACTIONSONMAGNETICS,VOL.46,NO.9,SEPTEMBER2010
StatorSlottingEffectontheMagneticFieldDistributionofSalientPole
SynchronousPermanent-MagnetMachines
GurakuqDajaku1andDieterGerling2
FEAAMGmbH,D-85577Neubiberg,Germany
InstituteforElectricalDrives,UniversityofFederalDefenseMunich,D-85577Neubiberg,Germany
Thispaperdealswithanewanalyticalmethodfordeterminingtheair-gapfluxdensityofsalientpolesynchronouspermanent-magnet(PM)machinesincludingthestatorslottingeffect.Theapproachtoanalyzetheair-gapfluxdensitybasedonthenewmodelistodeter-minetheair-gapmagnetomotiveforce(MMF)andtheflux-pathpermeancefunction.Wedeterminetheflux-pathpermeancefunction,whichincludesthestatorslottingeffect,byusingasimplemagneticreluctancenetworkthattakesintoaccountthegeometryofthemachineandthematerialcharacteristics.Usingthenewmodelwithstatorslotting,wecalculatetheair-gapfluxdensitydistributionofdifferentelectricmachinesusingfinite-elementmethodstoprovetheaccuracyofthenewmodel.
IndexTerms—Air-gapfluxdensity,analyticalsolution,finite-elementmethod(FEM),flux-pathpermeance,permanent-magnet(PM)machine,statorslottingeffect.
I.INTRODUCTION
PERMANENT-MAGNETsynchronousmachines
(PMSMs)gainmoreandmoreimportanceforspe-
cialdriveapplications.Uptorecentyears,PMSMswereknown
forsmalldrives,e.g.,forservoapplications.Inthelastyears,
PMSMshavebeenincreasinglyappliedinseveralareassuch
astraction,automobiles,etc.Thistypeofelectricalmachines
offermanyadvantages,includingahighpower-to-weightratio,
constantpoweroverawidespeedrange,andhighefficiency.
MagneticfieldanalysisinPMmachinesisanimportantpre-
requisiteforthepredictionofmachineparameters,electromag-
netictorque,radialforces,andsoon.Inparticular,accurate
knowledgeofthefluxdensitydistributionintheair-gapises-
sentialfortheaccuratepredictionofthemotorperformances.
Magnetconfiguration,magnetizationdirection,air-gaplength,
andthenumberofthepoleandslotcombinationhavesignificant
effectsonthefluxdensitydistributionintheair-gap.Further,
thepresenceofstatororrotorslotshavealargeinfluenceonthe
air-gapmagneticfielddistributionandthereforeontheelectro-
magnetictorque.Theconsequencescanbecoggingtorqueand
torqueripplescausingvibration,noise,andspeedfluctuation.
Therefore,thedetailedknowledgeofthefielddistributionsin
theair-gapisofmainimportanceforpredictingandoptimizing
theperformanceofPMmachines.
Ofcourseaswellknown,slottinginfluencesthemagnetic
fieldintwoways.First,itreducesthetotalfluxperpole,an
effectwhichisusuallyaccountedbyintroducingtheCarterco-efficientintothecalculation.Second,itaffectsthedistribu-
tionofthefluxdensityintheair-gapoftheelectricmachines.
Therefore,theslottingeffectisimportanttobetakenintoac-
countduringdeterminationoftheair-gapfluxdensity.
ManuscriptreceivedFebruary26,2010;revisedApril09,2010;acceptedApril15,2010.DateofpublicationMay03,2010;dateofcurrentversionAu-gust20,2010.Correspondingauthor:G.Dajaku(e-mail:Gurakuq.Dajaku@unibw.de).Colorversionsofoneormoreofthefiguresinthispaperareavailableonlineathttp://ieeexplore.ieee.org.DigitalObjectIdentifier10.1109/TMAG.2010.2049269Theair-gapmagneticfieldwithslottingeffectscanbeeval-
uatedbyavarietyoftechniquesincludinganalyticalorsemi-
analyticalmethodsaswellasnumericaltechniqueslikefinite
elementsorboundaryintegralmethods.Finiteelementsgive
accurateresultsconsideringgeometricdetailsandnonlinearity
ofmagneticmaterials.However,thismethodiscomputertime
consumingandpoorlyflexibleforthefirststepofdesignstage
ofelectricalmachines.Analyticalmethodsareusefultoolsfor
firstevaluationofelectricalmotorsperformancesandforde-
signoptimizationsincecontinuousderivativesissuedfromthe
analyticalsolutionareofgreatimportanceinmostoptimization
methods.Asignificantnumberofpublicationsontheanalytical
solutionoftheair-gapmagneticfieldinslottedmachinescanbe
foundintheliterature,e.g.,[1]–[17].
Twoanalyticalmethodsaremainlydevelopedformodeling
thestatorslottingeffect.Thefirstoneconcernstheuseofcon-
formalmappingtoconsiderslottingeffects[1]–[7],andtheac-
tualair-gapfluxdensityiscalculatedbymultiplyingtherela-
tivepermeancefunctionwiththeradialfluxdensityofaslotless
motor.Thismethodhasanimportantdrawbacksinceitisas-
sumedthattheslotwidthismuchsmallerthanitsheight.Fur-
thermore,eventhoughthismethodgivesinformationaboutthe
air-gapfluxdensityfluctuationduetostatorslotting,itdoesn’t
takecorrectlyintoconsiderationtheslottingeffect.Thereason
isthatthemagneticfieldandtheslottingeffectaredetermined
separatelyandfordifferentconditions.Thesecondmethodcon-
sistsofanalyticalsolutionofLaplaceorPoissonequationsin
thedifferentsub-domains(magnet,air-gapandslots)byap-
plyingtheboundaryconditionsontheinterfacebetweensub-do-
mains[8]–[13].However,thesemodelsarenotabletopro-
videanaccurateevaluationofair-gapfluxdensityiftheboth
永磁同步电机失磁故障检测相关阐述
永磁同步电机失磁故障检测相关阐述
摘要:随着科学技术的发展,永磁电机作为现阶段常见的电机类型之一,在保证电机作业质量的基础上加快电机作业效率,是现阶段社会发展的关键技术之一。而在实际作业环节,永磁电机作为借助磁力发挥功能的设备,很容易出现失磁状况,失磁会导致电机中的磁力丧失,严重影响永磁电机的作业状况,实际发展过程中就需要相关人员结合永磁电机的特点对失磁原因进行研究,并且及时地对故障进行检测,以保证永磁同步电机功能的正常发挥。
关键词:永磁同步电机;失磁;原因;检测手段
永磁同步电机作为先进技术的产物,具有效率较高、能量密度较为集中而且结构设计较为简单的特点,所以该技术应用十分广泛,已经覆盖到诸多工业领域。然而实际运用环节,永磁同步电机作业环节很容易受到温度变化、电枢反应以及设备振动等方面的影响出现失磁状况,从而影响电机功能的顺利发挥。在此背景下,针对永磁同步电机的失磁故障研究就成为相关行业发展的要点,要求专业的技术人员结合永磁同步电机的作业实际对失磁状况的原因以及影响进行研究,并且结合相关数据进行故障检测,及时地发现并对失磁状况进行检测,尽可能地规避失磁对电机产生的影响。本文就基于专业的技术软件对调速永磁同步电机进行建模仿真,借助计算机分析失磁故障状态下电机状况,从而实现对电机失磁故障的检测,方便对电机进行质量保证。
一、永磁同步电机失磁故障概述
(一)概念
永磁同步电动机以永磁体提供励磁,使电动机结构较为简单,降低了加工和装配费用,且省去了容易出问题的集电环和电刷,提高了电动机运行的可靠性;又因无需励磁电流,没有励磁损耗,提高了电动机的效率和功率密度。一般而言,永磁同步电动机由定子、转子和端盖等部件构成。失磁故障则是指发电机的转子失去励磁电流的状况,发电机失磁后,引起发电机失步,将在转子的阻尼绕组、转子表面、转子绕组中产生差频电流,引起附加温升,可能引起转子局部高温,产生严重过热现象,危及转子安全【1】。
电动机英语作文
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电动机英语作文
篇一:电动机专业英语
inductionmachine感应式电机
horseshoemagnet马蹄形磁铁
magneticfield磁场
eddycurrent涡流
right-handrule右手定则
left-handrule左手定则
slip转差率
inductionmotor感应电动机
rotatingmagneticfield旋转磁场
winding绕组
stator定子
rotor转子
inducedcurrent感生电流
time-phase时间相位
excitingvoltage励磁电压
solt槽
lamination叠片
laminatedcore叠片铁芯 竭诚为您提供优质文档/双击可除
short-circuitingring短路环
squirrelcage鼠笼
rotorcore转子铁芯
cast-aluminumrotor铸铝转子
bronze青铜
horsepower马力
random-wound散绕
insulation绝缘
acmotor交流环电动机
endring端环
alloy合金
coilwinding线圈绕组
form-wound模绕
performancecharacteristic工作特性
frequency频率
revolutionsperminute转/分
motoring电动机驱动
generating发电
per-unitvalue标么值
breakdowntorque极限转矩
breakawayforce起步阻力
overhauling检修 竭诚为您提供优质文档/双击可除
wind-drivengenerator风动发电机
revolutionspersecond转/秒
numberofpoles极数
speed-torquecurve转速力矩特性曲线
plugging反向制动
synchronousspeed同步转速
基于Maxwell的永磁同步电机短路故障诊断研究
龙源期刊网
基于Maxwell的永磁同步电机短路故障诊断研究
作者:乔俊宇 曲娜 鹿昭勋
来源:《科技资讯》2018年第12期
摘 要:针对缺少成熟电动机分析方法的情况,文章建立了基于Maxwell的永磁同步电动机二维有限元模型。通过仿真得到电机在正常工作和匝间短路故障情况下的电磁场分布和相关性能曲线。得到了不同条件下,反电势三次谐波含量随匝间短路程度的加剧而减少等结论,为永磁同步电机定子绕组早期匝间短路故障诊断提供了依据。
关键词:匝间短路 故障诊断 永磁同步电机 Maxwell
中图分类号:TM313 文献标识码:A 文章编号:1672-3791(2018)04(c)-0124-02
Abstract:As the current analysis method of motor is not sufficient, the finite element model of
the two dimensional transient field of the permanent magnet synchronous motor based on Maxwell is
established. By using Maxwell's powerful electromagnetic field analysis and reprocessing function,
the electromagnetic field distribution and related performance curves of the motor in normal and inter-turn short circuit fault are obtained. The conclusions such as three harmonics of anti-electric potential
同步电动机外文文献翻译中英文
外文文献翻译
(含:英文原文及中文译文)
英文原文
Always magnetic belt synchro motor direct torque control system Introduction
Synchronous motors are widely used in industrial production due to
their high power factor, high operating efficiency, good stability, and constant speed. Familiar with the starting failure of the synchronous
motor and troubleshooting in time has important significance for the motor itself and the production system. In order to troubleshoot faults and
handle faults in a timely and accurate manner, detailed analysis of
common faults in synchronous motors must be performed. 1 - Common Faults
1.1 The synchronous motor cannot start after being energized There are generally several reasons why a synchronous motor cannot
run after it is started:
(1) The power supply voltage is too low. Since the starting torque of the synchronous motor is proportional to the square of the voltage, if the
永磁同步电机故障诊断研究综述
永磁同步电机故障诊断研究综述
永磁同步电机(Permanent Magnet Synchronous Motor,PMSM)是一种高效率、高功率因数的电机,由于其具有较高的控制精度和动态性能,被广泛应用于机械传动系统中。然而,由于各种原因,永磁同步电机在实际运行过程中可能会出现各种故障,这些故障可能会导致其性能下降甚至完全失效。对永磁同步电机的故障诊断研究非常重要。
本文将对永磁同步电机故障诊断领域的研究进行综述,并从以下几个方面进行讨论和探究。
一、故障分类和特征提取
永磁同步电机的故障可以分为转子故障(如短路、断条等)、定子故障(如匝间短路、绝缘损坏等)以及电源故障等。在故障诊断过程中,正确分类和提取故障特征对于准确判断和定位故障非常关键。为此,研究者们通过分析电机的运行状态、电流、振动等多种信号,提出了各种故障特征提取方法,如时域分析、频域分析、小波变换等。
二、故障诊断方法和算法
针对永磁同步电机故障诊断的需求,研究者们提出了多种故障诊断方法和算法。其中,基于模型的方法通过建立电机的数学模型,利用状态估计和滤波技术来实现故障诊断。基于信号处理的方法则是通过对电机输出信号进行处理和分析,提取其中的故障信息。还有基于人工智能算法的方法,如神经网络、遗传算法、支持向量机等,这些方法通过学习经验数据,能够自动识别和判断故障。
三、故障诊断系统的设计与应用
将故障诊断方法应用于实际永磁同步电机系统中,需要设计和搭建一个完整的故障诊断系统。这个系统包括传感器采集模块、信号处理模块、故障特征提取模块、故障判断模块等多个部分。通过将这些模块进行集成和优化,可以实现对永磁同步电机故障的实时监测和诊断。
四、未来研究方向和挑战
尽管在永磁同步电机故障诊断领域已经取得了一些进展,然而仍然存在一些挑战和需要进一步研究的问题。故障特征提取方法需要更高的精度和鲁棒性;故障诊断系统需要更加智能和可靠;故障诊断算法需要更高的效率和实时性。未来的研究方向可以包括结合深度学习和机器学习算法来进行故障诊断、发展更高效的故障分类方法以及改进故障诊断系统的设计等。
《永磁同步电机故障排除及诊断流程分析综述2500字》
永磁同步电机故障排除及诊断流程分析综述
目录
永磁同步电机故障排除及诊断流程分析综述 .................................................................................. 1
1.1电机过热故障诊断方法及检修 ................................................................................................... 1
1.1.1定子绕组短路故障诊断及检修 ............................................................................................ 1
1.1.2铁心过热故障诊断及检修 .................................................................................................... 3
1.1.3机械过热故障诊断及检修 .................................................................................................... 4
1.2永磁同步电机无法转动故障诊断及检修 .................................................................................... 5
1.2.1永磁同步电机无法转动故障诊断方法及检修 .................................................................... 5
1.2.2电机控制器故障诊断及检修 ................................................................................................ 6
大型永磁风力发电机静态偏心故障分析与诊断研究
新疆大学硕士学位论文
III
generator fault and its own characteristics, this paper chooses to use the fault
characterization characteristic to design the early fault diagnosis scheme. Based on the
analysis of the stator current signal under the eccentric fault and the MATLAB toolbox,
the stator current under different eccentricity is decomposed by fast Fourier
decomposition, and the eccentric fault diagnosis is obtained by comparing the
amplitude of the power spectrum. To achieve the classification of eccentric fault and
the degree of eccentricity to determine the completion of large-scale permanent magnet
wind turbine static eccentric fault early diagnosis to ensure the stable operation of wind
turbine.
Keywords:Eccentricity; permanent magnet wind turbine; fault diagnosis; air gap
flux density;
新疆大学硕士学位论文
IV
目 录
基于改进ResNet_的PMSM_退磁与偏心故障诊断方法
1294 2024RadioEngineeringVol54No5doi:
10.3969/j.issn.1003-3106.2024.05.027
引用格式:郭又铭,吴钦木
.基于改进
ResNet的
PMSM退磁与偏心故障诊断方法[
J]
.无线电工程,
2024,
54(
5):
1294-1307.[
GUOYouming,
WUQinmu.PMSMDemagnetizationandEccentricityFaultDiagnosisMethodBasedonImprovedResNet[
J]
.Radio
Engineering,
2024,
54(
5):
1294-1307.]
基于改进
ResNet的
PMSM退磁与偏心故障诊断方法
郭又铭,吴钦木
(贵州大学电气工程学院,贵州贵阳
550025)
摘 要:针对近年来对永磁同步电机故障诊断的需求,提高故障诊断的精度。提出了一种基于多尺度特征融合与空洞
卷积金字塔模型的永磁同步电机诊断方法,可以通过电机运行时的定子电流数据直接对电机进行故障诊断。利用多尺度特
征融合模块提取图像不同尺度、不同分辨率的特征,提高单一图像的信息利用率;通过在特征融合模块中添加注意力机制
使网络中不同通道的特征权重保持高度一致,进一步确保了网络提取图像特征的能力;通过在空间池化金字塔中引入空洞
卷积核来构建空洞卷积金字塔,在解决了网络对同一特征反复提取、节约计算成本的同时,增强了模型的感受野,提高模
型对不同故障的诊断精度。实验结果表明,所提方法对不同类型的电机故障均具有较高的诊断精度。对比传统的智能算
法,其算法精度与损失函数都得到了明显改进。
关键词:永磁同步电机;改进
ResNet;多尺度特征融合;空洞卷积金字塔;故障诊断
中图分类号:TH133.3;
O313.7文献标志码:A开放科学(资源服务)标识码(
OSID):
文章编号:1003-3106(
2024)
05-1294-14
PMSMDemagnetizationandEccentricityFaultDiagnosisMethod
