问题 电磁分析磁导率和磁饱和度以及磁感应强度的关系??????
我在做电磁感应加热的仿真,由电磁理论知铁芯材料有磁导率和磁饱和度,也就是说当电流增加到一定程度的时候,铁芯上的磁感应强度会不在变化,但是我在用如下程序来做的时候却验证不了这个论点,不知道我的程序那里有问题?或者是因为我的电流加的还不够大,我最大加到1E25.
程序如下(或附件)
!增大激励电流密度,磁感应强度总会随着增大???矛盾
/prep7
MPTEMP,,,,,,,, !定义线圈及空气的磁导率为1
MPTEMP,1,0
MPDATA,MURX,1,,1
MPTEMP,,,,,,,,
MPTEMP,1,0
MPDATA,MURX,3,,1
et,1,plane53,,,1
MAT,2, !定义铁芯材料的BH曲线
MPREAD,emagM54,SI_MPL,C:\Program Files\Ansys Inc\v100
\ANSYS\matlib\,LIB
TBDE,BH,2,,,
TB,BH,2,1,22,
TBPT,,91.904,0.4
TBPT,,104.38,0.5
TBPT,,116.8,0.6
TBPT,,129.87,0.7
TBPT,,143.69,0.8
TBPT,,159.14,0.9
TBPT,,175.84,1
TBPT,,194.37,1.1
TBPT,,215.95,1.2
TBPT,,242.97,1.3
TBPT,,281.79,1.4
TBPT,,369.1,1.5
TBPT,,788.21,1.6
TBPT,,2136.7,1.7
TBPT,,4509.7,1.8
TBPT,,7977.9,1.9
TBPT,,15000,1.975
TBPT,,30000,2.055
TBPT,,60000,2.145
TBPT,,1.2E+005,2.235
TBPT,,2.4E+005,2.379
TBPT,,4.8E+005,2.681
cyl4,0.020,,0.001 !画线圈
agen,10,1,,,0.003 !画线圈
rectng,0,0.05,0.01,0.011 !画铁芯材料
rectng,0,0.07,-0.02,0.05 !画空气场
aovlap,all
numcmp,area
/pnum,area,1
asel,s,,,1,10,1 !自由划分网格
aatt,1,1,1
asel,s,,,11
aatt,2,1,1
asel,s,,,12
aatt,3,1,1
allsel
smrt,1
amesh,all
allsel !空气场边界条件磁矢量AZ=0
lsel,s,loc,x,0
lsel,a,loc,x,0.07
lsel,a,loc,y,0.05
lsel,a,loc,y,-0.02
dl,all,,az,0
allsel
asel,s,,,1,10,1 !在线圈上加电流激励
bfa,all,js,,,1e6 !加电流密度
finish
/solu
solve !求解 |