▷ IGBT compact model

Challenge

Predict junction temperature of an electrical element with a heat source determined by a non-linear Current–Voltage characteristic :

• • • • Thermal model – 2R component

      • Heat source – electrical power

      • Current–Voltage characteristic – series of non-linear curves for different temperature values

Solution

IGBT compact model as a composition of Electrical Element and 2R component compact models

• • • • Input

        • • R ( junction to bottom)

          • R ( junction to top)

          • Voltage or Current

      • Output

        • • Junction Temperature

how it works

• • • Junction temperature is used for Electrical Power determination from I-V chart

    • Resulting Electrical Power is applied to the model through the 2R component

▷Reference temperature for BCI-ROM extraction

Solution

Use reference temperature to obtain constant values from dependencies automatically for all materials

Update to the latest BCI-ROM version

▷Component Explorer Export and import of a component list

Challenge

Manage large volume of component materials and properties through Excel spreadsheet

Solution

Ability to export and import a component list from the Component Explorer dialog

• Component materials

• Heat source and 2R power

• LED current

Component properties can be exported into an Excel spreadsheet then edited and imported back.
The order of the components in the exported list follows the original designer’s hierarchy.
Properties available for editing :

• • • Component Material

    • Volume source value

    • 2R (instance from the library and power)

    • LED (instance from the library and current)

▷SC3D NASTRAN non-linear solver connection

Challenge

Many structural analysis applications of interest in electronics require non-linear solver capabilities

Solution

Connect Simcenter FLOEFD with Simcenter 3D Nastran solver to access its non-linear functionality

• • Leverage existing solutions in Simcenter portfolio

  • Initial step to exploring further application areas

  • SC3D Nastran solver 401 is used for Nonlinear analysis

  • SC3D Nastran should be installed and licensed independently

Connection with the Simcenter 3D Nastran solver opens its non-linear capabilities to users from their familiar Simcenter FLOEFD interface :

• • • Set up project, run solver and process results as usual.

    • SC3D Nastran solves Smart PCB with all nets for both levels of detail (fine and homogenized).

    • Easier design space exploration by working with one model

▷Structural : Large displacement

Challenge

Take into account structural non-linear behavior due to large displacement of geometry

Solution

Use Simcenter Nastran non-linear capabilities of iterative solver 401

▷Structural : Tolerance based contacts

Challenge

Create contacts on surfaces of overlapping bodies or bodies with the gaps between them in preparation for structural analysis.

Solution

Tolerance based contacts: ability to specify tolerances and use them to create contacts between bodies with gaps

• Linear and angle tolerances for contacts

• Glue contact between bodies with gap

Example of a tolerance-based contact with non-ideal geometry of a ball joint with overlapping areas and regions with gaps

▷Structural : User defined maximum aspect ratio in local mesh

Challenge

Create HEX dominant mesh for thin plates with high aspect ratio value, beyond the limitation of 1:4

Solution

Allow user to specify maximum aspect ratio for particular components in the Structural mesh settings dialog

▷Structural : Goals for frequency analysis

Challenge

Obtain eigenvalues of a frequency analysis as a goal function of a calculation, be able to conduct parametric study or optimization

Solution

add goals for frequencies