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JMAG provides many features, including the coupled analysis capability,
for the induction heating analysis to analyze the complicated phenomena
caused by the electromagnetic field and heat.
Coupled analysis
The magnetic field analysis and thermal analysis can be coupled. The heat
generation data and the temperature data can be exchanged between analyses,
and the magnetic field analysis and thermal analysis are run alternately
while taking into account the temperature dependency of the material.
Since the time constant used for magnetic field analysis is far shorter
than that used for thermal analysis, frequency response analysis is used
for magnetic field analysis and transient response analysis is used for
thermal analysis for the coupling. When transient response analysis is
used for the magnetic field and thermal analyses, different time step can
be set for each analysis.
The important points and modeling parts are different between magnetic
field analysis and thermal analysis. Different models and meshes can be
used between magnetic field analysis and thermal analysis.
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| Magnetic field analysis model |
Thermal analysis model |
2D magnetic field analysis and 3D thermal analysis can be coupled.
Mesh
Eddy currents generated by high-frequency power are concentrated on the
surface. The mesh for modeling the skin effect can be generated to simulate
the eddy currents.
Materials
The dependency of magnetizing properties and electric conductivities on
the temperature can be specified. With this setting, temperature distribution
at the time of the high-frequency induction heating can be obtained accurately.
Model for thermal analysis
A variety of boundary conditions required for thermal analysis are available.
The thermal contact and cooling are difficult to simulate in the FEM model.
However, these phenomena can be taken into account by connecting the equivalent
circuit model to the FEM model and setting the Lumped Constant Component
condition. The losses obtained from magnetic field analysis can be specified
for the heat source, and also the heat source can be set arbitrary.
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