Setting Core Loss for Transient and Eddy Current Solvers

For a Transient or an Eddy Current solver design, you may include core loss calculations in the simulation on any object that has a corresponding core loss definition (with core loss coefficient settings) in the material library.

To set core loss, in the General tab of the dialog box:

Click Maxwell > Excitations > Set Core Loss.

The Set Core Loss dialog box appears.

You can also open the Set Core Loss dialog box by right-clicking Excitations in the Project Manager, then selecting Set Core Loss on the context menu; or by right-clicking in the Modeler window and selecting Assign Excitation > Set Core Loss.

For each Object in the list, select or clear the check box for Core Loss Setting (if a corresponding core loss definition has been set). The Defined in Material column indicates whether the material assigned to each object contains a core loss definition. When selecting multiple entries, the changes are synchronized for all selected rows. Multi-select is supported by holding the Ctrl or Shift key while clicking.
Click the Select By Name button to enter the name of a specific object for selection. Regular expressions are also supported.
Optionally, click the Deselect All button to deselect all selected objects in the list.
For 3D and 2D transient solvers only, on the Advanced tab of the dialog box, you may select the option to Consider core loss effect on field. When selected, this option will estimate the core loss and subsequently modify the field solution, causing the resulting fields to be affected by the presence of the core loss. This option provides improved solution accuracy for materials exhibiting high core loss at the expense of increased solution time.

Note:

If the core loss model “hysteresis model” is chosen, then the “Consider core loss effect on field” checkbox is ignored, as the hysteresis model always models the effects of the hysteresis loss.
An iteration is required to consider loss effects on the field. For most really soft materials, the iteration is converged. However, if the loss coefficients kh and ke for magnetic steels, or Cm for power ferrites, are too large, the iteration could be diverged. In such cases, users need to double check the specified values, or not to consider core loss effects.

The default is to exclude this effect. In this case, the field calculation is performed without the core loss and the loss calculation is performed after the field solution is complete.

Click OK.

Setting Core Loss for Transient and Eddy Current Solvers

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