The Laminated Core node is used to model an anisotropic effective material for laminated soft magnetic cores that are not developing induced currents. The
Magnetization model can be set to
B-H Curve (default),
Effective B-H Curve, and
Relative Permeability, which have the same settings as described in the
Ampère’s Law node of the Magnetic Fields interface. The
Lamination model is used to choose between
Homogeneous (default),
Out-of-plane (available in 2D only), and
Direction based types of lamination. The first is used to model uniform material cores, as described in the
Ampère’s Law node of the Magnetic Fields interface. The latter are used to reproduce the homogenized effect of a stack of soft iron laminates and insulation spacers along a direction of lamination, based on the
Energy- and Coenergy-Based Magnetic Constitutive Relations. The direction of lamination and the stacking factor (the volumetric ratio between the laminates and the total stack) can be set. These two quantities are used to evaluate the effective magnetic energy density of the stack and the corresponding effective magnetic field.
It is also possible to specify the Loss Model. When enabled, it allows to define the
Volumetric loss density (SI unit: W/m
3) and it can be specified as
User defined, or, if
B-H Curve is specified, by using empirical loss formulas via
Steinmetz or
Bertotti coefficients. More information on loss models can be found in the
Loss Calculation node documentation. A
Stabilization section is also available to improve numerical stability. It is described under
Stabilization of the
Free Space node. In the
The Rotating Machinery, Magnetic Interface, this feature is called Laminated Core, Ampère's Law.