The mapping technology built into JMAG will match the physical properties even if the models are created in different ways. As an example, lets consider an analysis of a motor. A coupled analysis is performed using a magnetic field analysis of a 2D model and a thermal analysis of a 3D model. The coil ends are modeled only for the thermal analysis, and not the magnetic field analysis. The joule loss produced in the coil can still be mapped on the model used for the thermal analysis. The sum of the losses occurring in the coil of the circuit can also be mapped to the coil parts in the thermal analysis. The mapping JMAG provides gives the user more freedom when creating models.
The physical properties can even be mapped when a model has motion. For instance, many heated bodies in induction heating simulations move. JMAG monitors the part to correctly map the physical properties as the part moves in each step of the analysis.
(2) Time mapping
The time scale for the phenomena in the magnetic field analysis is not the same as the phenomena in the thermal analysis. JMAG is capable of mapping the physical properties even if the time scales are different. When a coupled analysis is performed for transient phenomena, the weight of the calculations increases if the time interval is small. JMAG treats phenomena with a small time scale as phenomena at a steady state. The results for one period are averaged, and then mapped in the analyses consisting of phenomena that have a larger time scale. In a coupled magnetic field and structural analysis (frequency response analysis), the electromagnetic force obtained in the transient analysis can be converted by FFT and mapped to a model for a structural analysis.
Linking to 3rd Party Software
The majority of this Technical Report has focused on coupled analyses in JMAG, but information for the physical properties in JMAG is compatible with a variety of 3rd party software. JMAG's structural analysis is compatible with NASTRAN data. A NASTRAN input file that accounts for the electromagnetic force distribution obtained in JMAG can be exported using the mapping feature. Linking to 3rd party software is fundamental to the development concepts behind JMAG, as our product policy of providing an open interface demonstrates.
This edition of the Technical Report has described the mapping technology as part of physical modeling. JMAG supports magnetic field analysis, thermal analysis, structural analysis, and electric field analysis providing a set of features to enrich these simulations. I look forward to introducing more of these features in future technical reports.
Mapping the heat generation distribution accounting for motion
The next edition of the Technical Report will introduce circuit/control modeling.