Hysteretic Core
Purpose
Magnetic core element with static hysteresis
Library
Magnetic
Description
This component models a segment of a magnetic core. It establishes a non-linear
relationship between the magnetic field strength
and the flux density
. The
hysteresis characteristics is based on a Preisach model with a Lorentzian distribution
function.
The figure below shows a fully excited major hysteresis curve with some minor
reversal loops. The major curve is defined by the saturation point (
,
), the
coercitive field strength
, the remanence flux density
and the saturated
permeability
.
Parameters
-
Cross-sectional area
- Cross-sectional area
of the flux path, in
.
-
Length of flux path
- Length
of the flux path, in m.
-
Coercitive field strength
- Coercitive field strength
for
, in A/m.
-
Remanence flux density
- Remanence flux density
for
, in teslas (T).
-
Saturation field strength
- Field strength
at the saturation point, in A/m.
-
Saturation flux density
- Flux density
at the saturation point, in teslas (T).
-
Saturated rel. permeability
- Relative permeability
of the core
material for
.
Probe Signals
-
MMF
- The magneto-motive force measured from the marked to the unmarked
terminal, in ampere-turns (A).
-
Flux
- The magnetic flux flowing through the component, in webers (Wb). A flux
entering at the marked terminal is counted as positive.
-
Field strength
- The magnetic field strength
in the core element, in A/m.
-
Flux density
- The magnetic flux density
in the core element, in teslas (T).
-
Loss energy
- The energy dissipated in the core, in joules (J). An energy pulse is
generated each time a minor or major hysteresis loop is closed.