EM analysis
Where it is
Section titled “Where it is”Not a setup-tree node. Embedded in the application.
Controls
Section titled “Controls”ANALYSIS
Section titled “ANALYSIS”Analysis type
Section titled “Analysis type”- Control: choice (
ComboRow) - Options:
Electrostatic,Current conduction,Magnetostatics,Eddy currents
The in-app guidance depends on the case:
- Where the current goes through a conductor, and the heat it makes on the way. Wants a conductivity.
- The magnetostatic case at a frequency: the currents an alternating field induces in nearby metal, and the heat they leave behind. Meshes the AIR around the part, like Magnetostatics — so this re-meshes when you switch to it.
- The magnetic field a steady current makes. Meshes the AIR around the part as well, because the field does not stop at its surface — so this re-meshes when you switch to it.
- The potential field in and around an insulator, and the field strength against a breakdown limit. Wants a permittivity.
Frequency
Section titled “Frequency”- Control: value (
ValueField) - Unit: Hz
- Value modes: none (plain entry)
- Shown when:
root.eddyCurrent
Mains is 50 or 60; an induction heater is tens of kilohertz. The skin depth goes as 1/√f, and the induced loss with it — at zero there are no eddy currents at all.
CURRENT
Section titled “CURRENT”＋ Add a current
Section titled “＋ Add a current”- Control: action (
ToolButton2) - Shown when:
root.magnetic
SPACE CHARGE
Section titled “SPACE CHARGE”＋ Add a space charge
Section titled “＋ Add a space charge”- Control: action (
ToolButton2) - Shown when:
root.electrostatic
Conditional and repeated groups
Section titled “Conditional and repeated groups”Per item in root.magnetic ? EmState.currents : []
Section titled “Per item in root.magnetic ? EmState.currents : []”repeated once for every entry in root.magnetic ? EmState.currents : []
Region
Section titled “Region”- Control: choice (
ComboRow)
Remove
Section titled “Remove”- Control: action (
ToolButton2)
Per item in root.conduction ? [] : EmState.sources
Section titled “Per item in root.conduction ? [] : EmState.sources”repeated once for every entry in root.conduction ? [] : EmState.sources
Region
Section titled “Region”- Control: choice (
ComboRow)
Remove
Section titled “Remove”- Control: action (
ToolButton2)
Charge density
Section titled “Charge density”- Control: value (
ValueField) - Unit: C/m³
- Value modes: none (plain entry)
Per cubic metre, not total. Coulombs are enormous — a real trapped charge is micro- or nanocoulombs per cubic metre, so 1e-6 is a large number here.
Problems reported against this step
Section titled “Problems reported against this step”The application reports no problems against this step.
… marks a value the application computes at run time, so the source carries no fixed text for it.