Describing sources

Introduction

It is possible to distinguish the following different types of sources:

permanent magnets
a DC electric current (uniform distribution of current density)
an imposed magnetic field (3D applications)
an imposed magnetic flux (2D applications)

The description of these sources is detailed:

in the Magneto Static applicationfor the part common in both applications
below - for the part specific to the Transient Magnetic application

Electric currents

The electric currents are currents, which can be constant or time dependent currents (stationary, sinusoidal, trapezoidal...).

Supply of conductors

In general, the conductors* have an external electric circuit supply (See chapter Circuit coupling: principles).

Note: * The conductors of the Stranded conductor type can also have a direct current supply as presented in § Describing sources of chapter Magneto Static application: principles.

Circuit coupling: reminder

The "coupling" with the electric circuit is carried out by linking the regions of the Coil conductor type or Solid conductor type (of the finite elements domain) to the components of the Stranded conductor type or Solid conductor type (of the associated electric circuit), as presented in the table below.

Type of components…			Type of regions…
Stranded conductor				Coil conductor
Solid conductor 2 terminals				Solid conductor
Solid conductor N terminal				Solid conductor

Imposed magnetic field (3D)

The “supplementary” magnetic field (H₀) imposed in the study domain can be uniform or space dependent. It can also vary in time (formula with input/output parameters).

Imposed magnetic flux (2D)

The magnetic flux (φ₀) imposed on a line region can be uniform or space dependent. It cannot vary in time.