用F命令给线圈加载电流的问题

bestboywith1

我想给线圈（3D）加载电流 当用F 命令的时候不知道该如何控制电流方向跟大小，请教大家下。
路径 Main Menu>Preprocessor>Loads>Define Loads>Apply>Electric>Excitation>impressed curr>On nodes
问题一：选择了截面上的节点后跳出对话框 如图一 在LOAD AMPS VALUE 后面的格子中该怎么填？》有人告诉我说是控制电流进出的方向 分别用+1 -1表示进或出。我的模型如图二 按所说的加上方向后 是不是电流就是按照所给的方向沿着整个线圈流动呢？
问题二：用F来加载电流的时候 电流大小怎么控制？在哪里给电流赋值呢？路径是什么呢？
事关我做的论文 求大家给我指点下啊~感激涕零~

LaoMu

Menu Paths
Main Menu>Preprocessor>Loads>Define Loads>Apply>Electric>Boundary>Temperature>On Volumes
Main Menu>Preprocessor>Loads>Define Loads>Apply>Electric>Excitation>AppCharDens>On Volumes
Main Menu>Preprocessor>Loads>Define Loads>Apply>Magnetic>Boundary>Temperature>On Volumes
Main Menu>Preprocessor>Loads>Define Loads>Apply>Magnetic>Excitation>AppCurrDens>On Volumes
Main Menu>Preprocessor>Loads>Define Loads>Apply>Magnetic>Excitation>AppVoltDrop>On Volumes
Main Menu>Preprocessor>Loads>Define Loads>Apply>Structural>Other>Fluence>On Volumes
Main Menu>Preprocessor>Loads>Define Loads>Apply>Thermal>Heat Generat>On Volumes
Main Menu>Solution>Define Loads>Apply>Electric>Boundary>Temperature>On Volumes
Main Menu>Solution>Define Loads>Apply>Electric>Excitation>AppCharDens>On Volumes
Main Menu>Solution>Define Loads>Apply>Magnetic>Boundary>Temperature>On Volumes
Main Menu>Solution>Define Loads>Apply>Magnetic>Excitation>AppCurrDens>On Volumes
Main Menu>Solution>Define Loads>Apply>Magnetic>Excitation>AppVoltDrop>On Volumes
Main Menu>Solution>Define Loads>Apply>Structural>Other>Fluence>On Volumes
Main Menu>Solution>Define Loads>Apply>Thermal>Heat Generat>On Volumes
试试这样看看能不能得到你想到的有方向的电流?