文档名：考虑磁畴偏转的无取向硅钢应力各向异性磁致伸缩特性模拟
摘要：无取向硅钢铁心的电磁振动是电机噪声的根本来源,采用夹件固定铁心可有效抑制其振动,但夹紧力施加不当会加剧铁心振动,原因为应力使无取向硅钢的磁畴取向发生偏转而引起磁致伸缩形变增大,形成应力各向异性.因此,为了获得准确的应力加载方法,需建立考虑磁畴偏转的无取向硅钢应力各向异性磁致伸缩模型.首先,求解自由能模型并计算能量极值点的分布,模拟无取向硅钢在磁场和应力作用下的磁畴偏转路径;其次,用磁晶各向异性能、应力各向异性能以及磁场能贡献的总和表示无磁滞磁化强度,将自由能模型与考虑磁滞的磁致伸缩模型相结合,通过无取向硅钢磁致伸缩特性测试获取模型参数并进行参数依赖性分析;最后,模拟应力与磁场作用下不同磁化方向的无取向硅钢的磁滞特性和磁致伸缩特性,通过仿真结果与实验结果的对比验证了该模型的准确性.结果表明,应力的增大会使无取向硅钢磁致伸缩应变值减小,同一应力下,磁致伸缩应变的大小会随磁化角度的增大而增大,该文所提出的应力各向异性磁致伸缩模型可以有效模拟此种变化规律.
Abstract：Vibrationandnoisebecomeimportantfactorsthatrestrictthedevelopmentofmotorstolargecapacity.Themosteffectivemethodistofixthecoreswithclampsandshells.However,thestressfromclampsandshellswilldeflectthemagneticdomainofthecoresiliconsteelmaterial,resultinginstressanisotropy,whichaffectsthedegreeofmagnetizationandmagnetostrictionofthematerial.Thus,consideringthedeflectionofmagneticdomains,astress-inducedanisotropicmagnetostrictivemodelisproposedtosimulatethemag-netostrictivepropertiesofnon-orientedsiliconsteelwithdifferentstressandmagnetizationdirections.Comparingthesimulationresultswiththeexperimentalresultsshowsthattheproposedmodeliseffective.Firstly,thefreeenergymodelofsiliconsteelisestablishedtoobtainthemagneticdomaindeflectionpathunderdifferentappliedstressandmagneticfields.Thefreeenergymodelissimplifiedbycoordinatetransformation,andthedistributionofenergyextremumiscalculated.Themagneticdomainmagnetizationenergyconsumptiondiagramandmagneticdomaindeflectionpathofnon-orientedsiliconsteelundertheexternalmagneticfieldandstressarealsosimulated.Theinfluenceoffreeenergymodelparameters(Ms,K1,K2,λ100,λ111)onthemodelandthemagneticdomaindeflectionisanalyzed.Then,thehystereticmagnetizationisexpressedbythesumofthemagneticcrystalanisotropyenergy,stress-inducedanisotropicenergy,andmagneticfieldenergycontribution.Combinedthefreeenergymodelwiththemagnetostrictionmodelconsideringhysteresis,thestress-inducedanisotropicmagnetostrictionmodelofnon-orientedsiliconsteelisestablishedbyimprovingthehystereticmagnetization.Themodelparametersareobtainedthroughthehysteresisandmagnetostrictivepropertytestofnon-orientedsiliconsteel,andtheparameterdependenceanalysisiscarriedout.Finally,thehysteresisandmagnetostrictivepropertiesofnon-orientedsiliconsteelwithdifferentmagnetizationdirectionsundertheexternalstressandmagneticfieldaresimulated,andtheproposedmodelisverifiedbysimulationandexperimentalresults.Besides,themagnetostrictivestrainofdifferentmagnetizationdirectionsvariesgreatly,andtheanisotropyofnon-orientedsiliconsteelisobvious.Underthesamestress,themagnetostrictivestrainincreaseswiththeincreaseofthemagnetizationdirections.Moreover,inthesamemagnetizationdirection,themagnetostrictivestraindecreaseswiththeincreaseofstress.Thefollowingconclusionscanbedrawnfromthesimulationandexperimentanalysis:(1)Consideringmagneticdomaindeflection,theproposedstress-inducedanisotropymodelofnon-orientedsiliconsteelcanaccuratelysimulatethehysteresisandmagnetostrictivepropertiesunderdifferentmagneticfieldsandstress.(2)Themagnetostrictionofnon-orientedsiliconsteelhasobviousanisotropy,whichdecreaseswiththeincreaseofstressandincreaseswiththeincreaseofmagnetizationangle.(3)Throughthesimulationofthemagneticdomaindeflectionpath,thevolumefractionofthe90°magneticdomaininthesiliconsteelwillincreaseduetostress,resultinginthereducedpermeabilityofthematerial.Moreover,thestressanisotropywillhinderthedeflectionandtransitionofthemagneticdomain,makingthemagnetizationofnon-orientedsiliconsteelmoredifficult.
作者：贲彤 孔玉琪 陈龙 方敏 张献 Author：BenTong KongYuqi ChenLong FangMin ZhangXian
作者单位：三峡大学电气与新能源学院宜昌443002三峡大学电气与新能源学院宜昌443002;湖北省微电网工程技术研究中心(三峡大学)宜昌443002省部共建电工装备可靠性与智能化国家重点实验室(河北工业大学)天津300130
刊名：电工技术学报
Journal：TransactionsofChinaElectrotechnicalSociety
年，卷(期)：2024, 39(4)
分类号：TM275
关键词：应力各向异性 磁畴偏转 自由能模型 磁致伸缩模拟
Keywords：Stress-inducedanisotropy magneticdomaindeflection freeenergymodel magnetostrictivesimulation
机标分类号：TM315TP391.9TN364.3
在线出版日期：2024年3月5日
基金项目：考虑磁畴偏转的无取向硅钢应力各向异性磁致伸缩特性模拟[
期刊论文] 电工技术学报--2024, 39(4)贲彤 孔玉琪 陈龙 方敏 张献无取向硅钢铁心的电磁振动是电机噪声的根本来源,采用夹件固定铁心可有效抑制其振动,但夹紧力施加不当会加剧铁心振动,原因为应力使无取向硅钢的磁畴取向发生偏转而引起磁致伸缩形变增大,形成应力各向异性.因此,为了获得...参考文献和引证文献
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