Inductance Type Settings for 3D Magnetostatic Solutions
Maxwell 3D provides two computation methods for calculating the inductance of current-carrying coils for magnetostatic solutions: Apparent and Incremental.
- Apparent inductance is defined as the ratio of flux to current at a certain operating condition. Alternatively, this can be expressed as the slope of a line from the origin to the operating point on the B-H curve. Apparent inductance is commonly used in nonlinear magnetic applications and in circuit analysis, and is the default method used by Maxwell.
- Incremental inductance is defined as the ratio of delta flux to delta current at a certain operating condition. This is equivalent to the slope of the tangent to the B-H curve at the operating point. Incremental inductance is commonly used in physical design because it is easy to measure.
To set the computation method:
- Click Maxwell 3D > Design Settings.
- On the Inductance Type tab, select the desired method: Apparent or Incremental.
Note: If you change the computation method after solving, all matrix results of both AdaptivePass and LastAdaptive solutions will be invalidated. Then, on the next simulation, the matrix of the last solved pass will be recomputed with the new method. If there are matrix expression caches for the AdaptivePass solution, then the cached values of previous passes will not be available because only the last pass is resimulated.
- Optionally, if you check Save as default, newly inserted designs will be set to use the specified computation method.
- When finished changing settings, click OK.
Alternate method: In the Project Manager tree, right-click <Design_name>, and select Design Settings.
The Design Settings window appears. You can also view and set design settings by selecting the current design, and then in the Properties window, select the tab for the solver.
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