I. Analysis Types and Modules

I. Analysis Types and Modules#

EMSolution can perform magnetic-field analysis including eddy-current analysis, which is basically quasi-static magnetic-field analysis, as well as electrostatic analysis. Select the analysis type in the [input control file]().

Analysis types#

EMSolution supports the following analysis types.

  • Static magnetic-field analysis

    • Can consider linear and nonlinear magnetization properties for coils and permanent magnets. Does not consider eddy currents.

  • AC steady-state analysis

    • Frequency-domain analysis including eddy currents. Can consider linear and complex relative permeability.

  • Transient analysis

    • Time-domain analysis including eddy currents. Can consider linear and nonlinear magnetization properties, mesh motion, mesh deformation, and COIL source motion.

  • Steady-current eddy-current analysis

    • Steady eddy-current analysis for a conductor uniform in the direction of motion and subject to a constant magnetic field.

  • Electrostatic analysis

    • Electrostatic analysis with applied potential or charge

  • Steady-current analysis

    • DC current analysis of conductive regions with applied potential

  • Low-frequency induced-current analysis

    • Eddy-current analysis for cases with very low frequency or very low conductivity, where the induced magnetic field from eddy currents is negligible compared with the external magnetic field.

Coupling functions#

The following analysis functions can be coupled with magnetic-field analysis.

  • Coupled equation-of-motion analysis

    • Couples electromagnetic force in mesh-motion or mesh-deformation regions with equations of motion. Coupling with springs, dampers, and similar components is also available.

  • Coupled electrical-circuit analysis

    • Couples analysis with electrical circuits connected to coils. Current-source and voltage-source analysis can consider resistors, inductors, and nonlinear components such as diodes and switches. Electrical circuits can also be calculated alone.

  • Coupled analysis with external software PSIM and MATLAB/Simulink

    • Coupled analysis with electrical circuits and equations of motion defined in external software

Note

External software coupling is available in supported versions. Contact us for details. MATLAB and Simulink are registered trademarks of The MathWorks, Inc. PSIM is a registered trademark of Powersim Inc.

Electromagnetic properties#

EMSolution can consider the following electromagnetic properties: - Isotropic and anisotropic linear electromagnetic properties

  • Isotropic and three-direction anisotropic relative permeability, conductivity, and permittivity.

  • Isotropic and anisotropic nonlinear magnetization properties

    • Isotropic, three-direction anisotropic, and two-dimensional anisotropic nonlinear magnetization properties (B-H curves); laminated cores (homogenization method); and hysteresis (Play model and Jiles-Atherton model).

  • Temperature dependence of isotropic nonlinear magnetization properties and conductivity

    • Uses B-H curves and conductivity tables for each temperature.

Modules#

EMSolution licenses enable or disable individual modules corresponding to analysis functions. The analysis functions included in each module are as follows.

Modules and analysis functions#

Module

Analysis function

Static

Static magnetic-field analysis, electrostatic analysis, and steady-current analysis

AC

Steady-current analysis (frequency-domain analysis)

Transient

Transient analysis (time-domain analysis)

Motion

Mesh and COIL motion

Deform

Mesh deformation

Dynamic

Coupling of equations of motion and electromagnetic-field analysis

Network

Electrical-circuit coupling

Steady current

Steady-current eddy-current analysis

Anisotropy2D

Two-dimensional magnetic anisotropy

Temperature-dependent material property

Temperature dependence of magnetic property data

PM Demagnetization

Nonlinear and demagnetization analysis of permanent magnets

Jiles-Atherton

Hysteresis analysis using the Jiles-Atherton model

Hysteresis

Hysteresis analysis using Play Model

PSIM coupler

Coupled analysis with PSIM

MATLAB/Simulink coupler

Coupled analysis with MATLAB/Simulink

Parallel

Parallel computation with OpenMP

Note

Some analyses become available when modules are combined.