ANSYS-Maxwell-电机振动噪声多场耦合分析和自动化分析流程

©2014ANSYS,Inc.April14,20142电机噪声综述电机振动噪声分析流程新的无缝集成的噪声自动化分析流程总结Agenda©2014ANSYS,Inc.April14,20143NoiseSourcesMagneticRadialSlotHarmonicsMagneticUnbalanceMechanicalSelfStatorModesofVibrationRotorBearingsBalancingDynamicEccentricityUnbalancedRotorEllipticalRotorSurfaceStaticEccentricityAuxiliariesLoadInducedCouplingsFoundationAerodynamicFluidCoolingPhenomenaElectronicSwitchingHarmonicsAudibleFrequencies20Hz20kHz5kHz261.63Hz60Hz4.186kHz电机噪声介绍©2014ANSYS,Inc.April14,20144ANSYS电磁、结构、噪声分析能力•电机振动和噪声的原因有很多.•ANSYS为电机的设计分析提供了非常优秀的工具和功能:电磁性能分析电机驱动性能分析结构分析通风和散热分析噪声分析©2014ANSYS,Inc.April14,20145电机电磁振动噪声分析流程电磁力计算时域内的集中力计算频域内的实部力和虚部力谐响应分析声压分析ANSYSMaxwellANSYSMechanicalANSYSAcoustics©2014ANSYS,Inc.April14,20146电机电磁分析20.0022.5025.0027.5030.0032.5035.0037.5040.00Time[ms]-20.00-15.00-10.00-5.000.005.0010.0015.0020.00Y1[A]SASIP,Inc.Basic_Inverter1CurrentsANSOFTCurveInfoRphaseA.ITRRphaseB.ITRRphaseC.ITR20.0022.5025.0027.5030.0032.5035.0037.5040.00Time[ms]0.002.505.007.5010.0012.5015.00FEA1.TORQUESASIP,Inc.Basic_Inverter1TorqueANSOFTCurveInfoFEA1.TORQUETR©2014ANSYS,Inc.April14,20147径向电磁力计算•利用气隙磁通密度计算力密度•Maxwell张力法–计算定子上任意一点的力密度–计算气隙上某条线上的力密度–计算定子齿尖的力密度•边的力密度–Maxwell的默认输出量–可以用于计算定子齿尖的集总力•自动从Maxwell耦合力密度到ANSYSMechanical.(2D-2D,2D-3D,3D-3D)©2014ANSYS,Inc.April14,20148Maxwell中的力密度0.005.0010.0015.0020.0025.0030.0035.0040.00Time[ms]-250.00-200.00-150.00-100.00-50.00-0.0050.00Force(Newtons)02_DC-6step_IPMRadialForceonToothTipsANSOFTCurveInfoExprCache(ToothTipRadial_Full1)ExprCache(ToothTipRadial_2)ExprCache(ToothTipRadial_3)ExprCache(ToothTipRadial_4)ExprCache(ToothTipRadial_5)ExprCache(ToothTipRadial_6)0.005.0010.0015.0020.0025.0030.0035.0040.00Time[ms]-30.00-25.00-20.00-15.00-10.00-5.000.005.0010.00Force(Newtons)02_DC-6step_IPMTangentialForceonToothTipsANSOFTCurveInfoExprCache(ToothTipTangent_Full1)ExprCache(ToothTipTangent_2)ExprCache(ToothTipTangent_3)ExprCache(ToothTipTangent_4)ExprCache(ToothTipTangent_5)ExprCache(ToothTipTangent_6)©2014ANSYS,Inc.April14,20149转子偏心模型©2014ANSYS,Inc.April14,201410偏心模型电磁力的参数化分析•转子偏心幅度0%,25%,50%•多核计算机上同时求解•显示：右边齿尖上的径向力•对径向力进行FFT分析©2014ANSYS,Inc.April14,201411直接力密度耦合•电磁力通过Workbench从Maxwell耦合到Mechanical•2D边密度和3D面密度•用于后续的瞬态结构分析集总力耦合•通过Maxwell的‘EdgeForceDensity’计算齿尖部分的电磁力•通过手动和APDL设置集中力•用于后续的谐响应分析和噪声分析电磁、结构两种耦合方式©2014ANSYS,Inc.April14,201412谐响应分析HelpsdeterminethatMaxAmplitude(1.7mm)occursat8710HzontheselectedvertexFrequencyresponseataselectednodelocationofthemodel.©2014ANSYS,Inc.April14,201413噪声分析结果0.5mPres_1Pres_2Pres_3Freq(Hz)Pressure(Pa)PressurevsFreq©2014ANSYS,Inc.April14,201414电机噪声综述电机振动噪声分析流程新的无缝集成的噪声自动化分析流程总结Agenda©2014ANSYS,Inc.April14,201415振动噪声分析流程MagneticFieldStructuralDynamicsAcousticFieldForcesDisplacementsEMForceMappingEMForce噪声分析谐响应分析电磁场分析©2014ANSYS,Inc.April14,201416自动化的分析流程©2014ANSYS,Inc.April14,201417激活噪声计算（ACT）选项在Workbench页面激活:1.选择“InstallExtension…”选项2.打开对话框，选择“*.wbex”文件(e.g.,ExtAcoustics_150.26.wbex，可以从网上下载)3.安装完毕4.选择“ManageExtensions…”选项5.激活ExtAcoustics注意:ACTExtension只需要激活一次。©2014ANSYS,Inc.April14,201418Maxwell的简单设置SelectObjectsDefaultOptionsAdvancedFourierTransformOptions©2014ANSYS,Inc.April14,201419瞬态力的波形6TeethForces200HzACCurrents©2014ANSYS,Inc.April14,201420Maxwell与谐响应分析耦合的背后TheuserhasjusttolinkgraphicallyMaxwellandANSYSHarmonic.Behindthesceneline,we:-ComputetheMagneticForces-ComputeaFFTobjectperobject-Couple2meshtopologies-Automaticallyapplytheamplitudesandphases-Couple2differentgeometries-Couple2differentgeometriesincl.symmetries-GettheHarmonicResponse-ComputetheMagneticfieldsMagneticDomainMechanicalDomain©2014ANSYS,Inc.April14,201421交流磁场力的耦合©2014ANSYS,Inc.April14,201422交流结构谐响应分析定子背板表面的切向变形幅值和相位©2014ANSYS,Inc.April14,201423交流结构谐响应分析定子背板表面的径向力幅值和相位作为噪声仿真的输入源©2014ANSYS,Inc.April14,201424交流噪声分析Microphone)(2log10log1022222dBpppppLrefimagrealrefrmsSPLPref=2e-5Pa©2014ANSYS,Inc.April14,201425交流噪声分析Pressures©2014ANSYS,Inc.April14,201426噪声还原利用噪声声压的Re/Im值麦克风可以近似为一个线性的转化器，将声压信号[Pa]转化成电压信号[mV]将电压信号缩放到可以听到的范围比较:-3800Hz的单频信号-4400Hz的单频信号-多频混合信号{2400,3800,4400,4800}Hz©2014ANSYS,Inc.April14,201427联系方式：