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ansys電磁場分析指南-第三章2-d諧波ac磁場分析-資料下載頁

2025-08-12 16:41本頁面

【導(dǎo)讀】諧波分析中中不允許存在永磁體。對于低飽和狀態(tài),進(jìn)行線性的時間-諧波分析時,可假設(shè)導(dǎo)磁率為常數(shù)。中高飽和條件,應(yīng)考慮進(jìn)行非線性的時間-諧波分析或時間-瞬態(tài)求解(第4章)。得總的電磁力、力矩和功率損失,很少涉及實(shí)際磁通密度具體波形。均”力矩和功率損失,又比進(jìn)行瞬態(tài)-時間分析所需的計(jì)算量小得多。B-H曲線來替代直流B-H曲線。時間平均總力、力矩和損失是。由近似的磁場基諧波來確定,逼近于真實(shí)值。詳細(xì)情況參見《ANSYS單元手冊》,該手冊以單元號為序排列。參考手冊》也有進(jìn)一步的講述。電流、或電動勢降。義的材料性質(zhì)或ANSYS用戶自己定義的材料性質(zhì)。命令或其等效的GUI路徑指定。電塊導(dǎo)體和共端點(diǎn)多導(dǎo)體等情況。電位υ的單位為“伏-秒”,其在ANSYS中的自由度為VOLT。在平面或軸對稱分析中,整個導(dǎo)體截面的υ是常數(shù)(即電。描述,ANSYS程序利用這些實(shí)常數(shù)來計(jì)算線圈的電阻和電感。下面將對各種終端條件作簡要介紹。

  

【正文】 ty MenuParametersGet Scalar Data,出現(xiàn)標(biāo)量參數(shù)列表. " Model data",選擇右列的" Areas". OK,出現(xiàn)另一個菜單. " Name of parameter to be defined"域?yàn)椋?a". " Area number N"域中輸入 1. " Area data to be retrieved"域?yàn)椋?Area",再按 OK. OK. Main MenuPreprocessorAttributesDefinePicked Areas,出現(xiàn)拾取菜單. 4,按拾取菜單中的 OK. OK. " Material number"域中,選擇 1. " Element type number"域中,選擇 3 PLANE53. OK. 步驟 9:設(shè)置網(wǎng)格密度 Utility MenuWorkPlaneChange Active CS toGlobal Cylindrical. Utility MenuSelectEntities,出現(xiàn)選擇實(shí)體對話框. " Lines"和" By Location". " Min,Max"域?yàn)?9*s. OK. Main MenuPreprocessorMeshTool. Size Controls 段,點(diǎn)取 Lines,Set Pick All " No. of element divisions"域?yàn)?1,再按 OK. MeshTool 菜單的 Size Controls 段,點(diǎn)取 Globl,Set " No. of element divisions"域?yàn)?8,再按 OK. 步驟 10:為遠(yuǎn)場區(qū)劃分網(wǎng)格,定義線圈參數(shù) MeshTool 菜單的 Mesh 段,選擇 Areas, Quad, Map, 和 3/4 sides,然后點(diǎn)取 MESH 1 和 4. OK. MeshTool 菜單中,打開 SmartSizing,并將 SmartSizing 滑塊移動到 2 MeshTool 菜單的 Size Controls 段,點(diǎn)取 Globl,Set Element edge length域輸入 s/4,點(diǎn)取 OK MeshTool 菜單的 Mesh 段,選擇 Areas, Tri, 和 Free,然后點(diǎn)取 MESH 窗口中拾取實(shí)體面 5. OK. Main MenuPreprocessorReal Constants Add/Edit/Delete,出現(xiàn)實(shí)常數(shù)對話框. Add,出現(xiàn)單元類型對話框. 2,按 OK,出現(xiàn)另一個對話框. " Coil crosssectional area(CARE)"域?yàn)?2*a ," Total number of coil turns(TURN)"域?yàn)?n," Current in Zdirection(DIRZ)"域?yàn)?1,"Coil fill factor(FILL)"域?yàn)?1. OK. Close,關(guān)閉實(shí)常數(shù)對話框. 步驟 11:耦合線圈的電流自由度 Utility MenuParametersScalar Parameters,出現(xiàn)標(biāo)量參數(shù)對話框. n1=node(s,0,0)并回車 . Close,關(guān)閉對話框. Utility MenuSelectEntities,出現(xiàn)選擇實(shí)體對話框. " Elements"、" By Attribute"、" Material num"和" From Full". " Min,Max ,Inc"域?yàn)?2. OK. Utility MenuSelectEntities,出現(xiàn)選擇實(shí)體對話框. " Nodes"、" Attached to "、 Elements 和 From Full. OK. Main MenuPreprocessorCoupling/CeqnCouple DOFs,出現(xiàn)拾取菜單. Pick All,出現(xiàn)耦合自由度對話框 . " Set reference number" 域輸入 1. " Degreeoffreedom label"域選擇 CURR. OK. Utility MenuSelectEverything. 步驟 12:設(shè)置求解條件 Utility MenuWorkPlaneChange Active CS ToGlobal Cylindrical. Utility MenuSelectEntities,出現(xiàn)選擇實(shí)體對話框. " Nodes"、" By Location "和" X Coordinates". " Min,Max"域?yàn)?12*s. OK. Main MenuSolutionLoadsApplyMagicFlagInfinite Surf On Nodes,出現(xiàn)拾取菜單. Pick All. Utility MenuWorkPlaneChange Active CS toGlobal Cartesian Utility MenuSelectEntities,出現(xiàn)選擇實(shí)體對話框. " Nodes"、" By Location "和" X Coordinates". " Min,Max"域?yàn)?0. OK. Main MenuSolutionLoadsApplyMagicBoundaryFlux ParlOn Nodes,出現(xiàn)拾取菜單. Pick All。 Utility MenuSelect Everything. Main MenuSolutionAnalysis TypeNew Analysis,出現(xiàn)分析類型對話框. Harmonic,再按 OK. Utility MenuSelectEntities,出現(xiàn)選擇實(shí)體對話框. " Elements"和" By Attributes" . " Min,Max"域?yàn)?2,再按 OK. Main MenuSolutionLoadsApplyMagicExcitationVoltage DropOn Elements,出現(xiàn)拾取菜單. Pick All. " Voltage drop mag(VLTG)"域中輸入 12, 再按 OK. Utility MenuSelectEverything. Main MenuSolutionLoad Step OptsTime/FrequencFreq and Substps,出現(xiàn)對話框. " Harmonic freq range"域的第一個值為 60. OK. 步驟 13:求解 選擇 Main MenuSolutionSolveCurrent LS. 步驟 14:后處理 Main MenuGeneral PostprocRead ResultsFirst Set. Main MenuGeneral PostprocPlot ResultsContour Plot2D Flux Lines,出現(xiàn)畫 2D 磁力線對話框. OK,圖形窗口中畫出磁力線 . Utility MenuParametersGet Scalar Data,出現(xiàn)標(biāo)量數(shù)據(jù)對話框. " Results data",從右列中選擇" Nodal results". OK,出現(xiàn)節(jié)點(diǎn)結(jié)果對話框. " Name of parameter to be defined"域中輸入" curreal",再按回車鍵. " Node number N"域中輸入" nl",再按回車鍵. " Results data to be retrieved"域中選擇" Current CURR". OK. Utility MenuParametersScalar Parameters,出現(xiàn)標(biāo)量參數(shù)列表. " curreal= ",按 Close. Main MenuGeneral PostprocRead ResultsBy Load Step,出現(xiàn)對話框. " Real or imaginary part"域?yàn)?Imaginary part,再按 OK. Main MenuGeneral PostprocPlot Results Contour Plot2D Flux Lines,出現(xiàn)畫 2D 磁力線對話框. OK,圖形窗口中畫出虛部磁力線 . Utility MenuParametersGet Scalar Data,出現(xiàn)標(biāo)量數(shù)據(jù)對話框. " Results data",從右列中選擇" Nodal results". OK,出現(xiàn)節(jié)點(diǎn)結(jié)果對話框. " Name of parameter to be defined"域中輸入" curimag". OK. Utility MenuParametersScalar Parameters,出現(xiàn)標(biāo)量參數(shù)列表. " curimag= ",按 Close. 步驟 15: 按工具條中的 Quit 按鈕,退出 ANSYS 程序。 ANSYS 命令流實(shí) 現(xiàn) /batch,list /prep7 /title, Voltagefed thick stranded coil in free space /,Calculate the current in the coil from an applied AC voltage /, /,Parameters /,n = 500 coil turns /,s = .02 (coil winding width and depth) meters /,r = 3*s/2 meters (mean radius of coil) /, /, /nopr et,1,53,1! air et,2,53,2,1! voltage forced coil et,3,110,1! farfield emunit,mks mp,murx,1,1 mp,murx,2,1 mp,rsvx,2,! resistivity of coil s=.02 n=500 r=3*s/2 rectng,s,2*s,0,s/2 pcirc,0,6*s,0,90 pcirc,0,12*s,0,90 aovlap,all asel,s,area,1 aatt,2,1,2 asum *get,a,area,area! area of 1/2 coil crosssection asel,s,area,4 aatt,1,1,3 asel,all csys,1 lsel,s,loc,x,9*s lesize,all,1 esize,8 mshape,0,2d! mapped mesh with quads mshkey,1 amesh,1,4,3! mesh farfield and coil smrtsize,2 esize,s/4 mshape,1,2d! specify triangle elements mshkey,0! free mesh amesh,5! mesh air region r,1,2*a,500,1,1! coil constants n1=node(s,0,0)! get a node on the coil esel,s,mat,2! get coil elements nsle,s cp,1,curr,all! couple curr dof in coil allsel,all csys,1 nsel,s,loc,x,12*s sf,all,inf! set infinite surface flag csys,0 nsel,s,loc,x,0 d,all,az,0! fluxparallel condition allsel,all finish /solu antype,harm esel,s,mat,2 bfe,all,vltg,12! 12 volts load (real) esel,all harfrq,60! 60 Hz. solve finish /post1 set,1 plf2d! Plot real flux lines *get,ireal,node,n1,curr set,1,1,1 plf2d! Plot imaginary flux lines *get,imag,node,n1,curr *status! Imaginary and real ponents of current finish 算例 二維非線性諧波分析(命令流方式) 問題描述 一塊厚度為 5mm 半 無限鋼板在一個線圈產(chǎn)生的磁場強(qiáng)度 Hm=件下( 50Hz),計(jì)算它的焦耳損耗(渦流損耗)。其理論結(jié)果為 本算例采用的參數(shù)如下 材料特性 幾何特性 載荷 μ r=(線圈) dd= Hm=J=Hm/dy ω=50Hz BH 曲線(鋼板) dx=dd/6 ρ = 1/(鋼板) dy=dd/6
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