AC/DC Module

New Functionality in Version 5.2a

Hysteresis Jiles‑Atherton material model

The Jiles‑Atherton material model for hysteresis captures important properties of ferromagnetic materials and allows for realistic modeling of devices like transformer cores, electrical motors, etc. It is available in the Magnetic Fields interface; the Magnetic Fields, No Currents interface; and the Rotating Machinery, Magnetic interface. It supports fully anisotropic (vector) hysteresis modeling.

Magnetic Shielding with saturation effects

The Magnetic Shielding boundary condition now supports magnetic saturation in the Magnetic Fields interface; the Magnetic Fields, No Currents interface; and the Magnetic and Electric Fields interface. The effect is important when designing thin, high-permeability shields for sensitive electronics, for example, photomultiplier tubes. Such shields easily saturate and, above the saturation limit, the shielding efficiency drops substantially.

Merged, updated, and enhanced Coil features

The Single-Turn Coil and Multi-Turn Coil features in the Magnetic Fields interface and the Magnetic and Electric Fields interface have been merged into a single Coil feature. It provides a more streamlined workflow and better flexibility:

•	The Coil Geometry Analysis preprocessing step can now handle single-conductor (old Single-Turn) 3D coils. This allows for the modeling of arbitrary shaped conductor as sources of excitation for the magnetic interfaces, with better convergence properties than the old Single-Turn Coil features.

•	Coil Geometry Analysis now supports boundary coils in addition to domain coils.

•	Single-conductor coils with voltage excitation can now be solved in time-dependent studies (in the Magnetic Fields interface).

•	Single-conductor coils now apply their excitation as an external electric field, giving physically meaningful electric fields in the entire geometry.

Domain Terminal

The Terminal feature in the Electric Currents and Electrostatics interface is now also available on the domain level. This is convenient for more geometrically complex electrodes that would involve the selection of a large number of boundaries when using a terminal at the boundary level. The unknowns for the electric potential inside the terminal’s domain selection are not solved for but replaced by a variable. This is useful when modeling electrodes with a finite thickness that is respected by the geometry.