2D Sources/Excitations
To compute fields for a structure, you must define a source of charge, voltage, current, or electric or magnetic fields for your model. Assign at least one object or edge as either a source (such as a current, charge, or voltage) or a value boundary.
Permanently polarized or magnetized materials also act as sources of charge or magnetic field (respectively). If you do not identify some type of source, the Maxwell 2D will not be able to generate a solution.
The field quantities computed by each solver — and the required electromagnetic sources — are given in the following table:
|
Field Solver |
Sources |
Field Computed |
Derived Field Quantities |
|
Electrostatic |
F |
E, D |
|
|
Magnetostatic |
AZ (XY models), |
H, B |
|
|
Eddy Current |
AZ(wt)
(XY models), |
JZ(wt) (XY models), Jf(wt) (RZ models), H(wt), B(wt), |
|
|
DC Conduction |
F |
E, D, J |
|
|
AC Conduction |
F(wt) |
E(wt), J(wt) |
|
|
Transient |
Transient voltages and currents through External Circuit connection. Current; current density; coil; end connection |
AZ (XY and RZ models) |
H, B |
where
- A is the magnetic vector potential.
- H is the magnetic field.
- B is the magnetic flux density.
- F is the electric potential.
- E is the electric field.
- D is the electric flux density.
- J is the current density.
These quantities are phasors in AC simulations.