a question about 97 element

ponderadams

97单元keyopt=0~4，分别代表不同的类型

KEYOPT(1) Element degrees of freedom and formulation selection:
Classical Formulation
0 -- AX, AY, AZ degrees of freedom: static domain, source domain      ！静场
1 -- AX, AY, AZ, VOLT degrees of freedom: eddy current domain, velocity effect domain ！计算涡流，velocity effect 怎么用呀？需要耦合电压自由度
2 -- AX, AY, AZ, CURR degrees of freedom: voltage-fed stranded coil  ！能不能这样理解，加载电压的绞线圈，需要耦合电流自由度？

For voltage forced magnetic field (KEYOPT(1) = 2) and circuit coupled problems (KEYOPT(1) = 3,4), note the following additional restrictions:
For (KEYOPT(1) = 2 or 3), all CURR degrees of freedom in a coil region must be coupled , and all EMF degrees of freedom in a coil region must be coupled.！是不是意味着这个类型必须耦合CURR自由度和EMF自由度？

3 -- AX, AY, AZ, CURR, EMF degrees of freedom: circuit-coupled stranded coil  ！能不能这样理解需耦合CURR自由度和EMF自由度，并加载电流/电流密度载荷？
4 -- AX, AY, AZ, VOLT, CURR degrees of freedom: circuit-coupled massive conductor ！块导体，需耦合volt和CURR自由度么？并加载电流，这个电流是不是总电流=匝数*每匝电流，还是加载每匝电流？


另一个问题：绞线圈实常数的问题

VOLU	This represents the actual volume of the finite element coil region, not the total volume of the full coil. ！线圈一般是圆环柱，那么圆环柱内部的区域算是the finite element coil region，因此也应算到这个体积里面吧？
CSYM	This constant is the coil symmetry factor; the multiplier of the VOLU constant required to represent the total volume of the full coil. CSYM times VOLU equals the total volume of the conductor. ！CSYM=线圈实际体积/VOLU
FILL	The coil fill factor represents the fraction of the coil cross-section that the conductor occupies. You can use this factor to adjust coil resistance. ！我做的变压器模型，因为一次二次耦合124 绞线圈单元，结果显示一次侧输入(入口)电阻太大，导致（我也不知道是不是有因果关系）二次侧感应出来的电压很小很小，因此二次侧电流和一次侧电流很小，各个参数差不多小了4个等级，我不知道是哪个地方出了问题

对变压器仿真有兴趣的朋友请进http://www.simwe.com/forum/thread-769523-2-10.html，帮我提提意见，谢了

[ 本帖最后由 ponderadams 于 2007-5-23 10:02 编辑 ]

lilulilu

1.velocity effect 怎么用呀？
定义实常数
VELOX, VELOY, VELOZ
Velocity components in the Global Cartesian Coordinate system X, Y, and Z direction respectively.

OMEGAX, OMEGAY, OMEGAZ
Angular (rotational) velocity (Hz, cycles/sec) about the Global Cartesian system X, Y, and Z-axes respectively, located at the pivot point location (XLOC, YLOC, ZLOC).

2.“加载电压的绞线圈，需要耦合电流自由度？”
根据2d使用的经验，是的

下面的话既然是帮助里的那么肯定是的！
3.只有solid97单元可以模拟载压绕线圈，必须定义实常数来表征绕线导体
curr表示线圈绕组每匝电流
volu模型导体体积（并非真是体积，只是建立了分析模型的那部分体积）
csym对称系数，乘以volu就可得到实际的线圈体积

ps：3D静磁分析，只有97单元能通过keyopt考虑速度效应

参考文献：
ansys10.0工程电磁分析技术与实例详解

[ 本帖最后由 lilulilu 于 2007-5-23 16:40 编辑 ]