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ElectroFlo Providing Solutions for Electronics

Heat Removal

Provides a noninvasive viewinside the electronics boxes

A critical tool to help electronic designers solve the heat problem

Manydifferentiating andunique features

Usedgloballywith customers in US, South America, Europe andAsia

Easy to use andfull-featured

The new release of the software is redesigned based on manyyears of experience in aircraft and automotive industries

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ElectroFlo: Time Saving Benefits

As the level of model complexity increases the power and efficiency of

ElectroFlo becomes more apparent

ModelManagement Center Using List/Tree View

Display entire/part of model; sort by any attribute or use color-coding

Select solids/boundary conditions by

Mouse clicking/dragging on List-view

Advanced search on name, power material or any other properties

Make changes in many solids or faces of solids in a single step

Multi-SystemModeling

Combine existing models of components, boards and electronic boxes

N

ever need to build the same model more than once

Automated Expert Reports

Select report format prior to simulation.

Color-coded charts using red, yellow and green system

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Define Geometry

Import solids directly from CADand other formats Automatically filter unwanted and irrelevant geometry

Create the ThermalModel

Mesh, define loads, boundary condition and ambient environment

Wizard mode guides new users in a step-by-step approach

Advanced GUI mode provides the most efficient modeling environment

Hierarchy structure (models/assemblies/parts/solids) keeps models concise

Check for Errors

Automated error-checking tools ensures proper model set-up

Flags the user when general guideline are not followed

Perform Simulation

Choose simulation type (transient/steady)

Choose report/post-processing preferences

ElectroFlo: Ease-of-Use Benefits

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ElectroFlo: Advanced Solver

ElectroFlos advanced solver provides the analyst all the tools and features

necessary for accurate and efficient analysis

Coupled Electrical Solver

Automatically accounts for heat losses in electrical conductors

Electrical resistivity updates as conductor temperature changes

Integrated Thermal/Flow Network Solvers

Define internal details without increasing the core model size

Best approach for liquid cooling channels and compact heat-exchanger and cold-plates

Thermal/Electrical Via and lead tools

Thermal connection with specified conductor area and material

Connect to desired board layers and optionally bypass other layers

Patented Radiation Solver

Automatically include radiation surfaces

No user intervention necessary

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Geometry

Components, traces and other conductorsfrom sources in various formats.

Heat Generation

Two main contributors:

Component losses Joulian dissipation due to current flow in

traces and connectors

Conjugate internal heat transfer Conduction

Internal natural convection (using CFD)

Internal thermal radiation

Cooling to ambient Ambient natural convection and radiation

Bussed Electrical Center (BEC)

Example: Coupled Thermal/Electrical/CFD

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A significant portion of the heat generated in the system is theJoulian heat due to electrical current flow in various traces andstamp metal conductors.

Red : Main Circuit

Gray: Secondary Circuits

Electrical Conduction Regions

116 amps in

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Trace and conductor geometryimported and simplified from CAD to

EFlo using an automated procedure.

A preprocessing tool, examines allelements and, using element electrical

resistivity and electrical links, identifiesindividual conduction regions (circuits).

The circuits are then displayed indifferent colors.

Extensive tools are available for the

user to examine various circuits andcheck for continuity and properamperage.

Electrical Conduction Regions

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The following types of boundary conditions are used to tie the model toits environment:

Convection and Radiation to ambient

Electrical boundary conditions (voltage and current BCs for Battery and

connectors)

Cable heat sinking

Walls: Convection and Radiation

Battery Cable

Voltage & Conduction BCs

Cables: Current & Conduction BCs

Boundary Conditions

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Results Temperature Distribution

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Results: Conductor Temperature