Heating Caused by Applied Currentexamples|products|Murata Software Co., Ltd.

Example1 Heating Caused by Applied Current

General

  • This is an example of the magnetic field-thermal analysis.
     

  • The joule loss due to the applied current and the resulting heating are solved.
     

  • The vectors of the magnetic field and the temperature distribution by the heating are viewed.
     

  • Unless specified in the list below, the default conditions will be applied.
     

 

Analysis Space

Item

Settings

Analysis Space

3D

Model unit

mm

 

Analysis Conditions

Item

Settings

Solvers

Magnetic Field Analysis [Gauss]

Thermal Analysis [Watt]

Analysis Type

Magnetic field analysis: Static analysis

Thermal analysis: Steady-state analysis

Options

N/A

 

The Thermal Load tab is set as follows.

Tab

Setting Item

Settings

Thermal Load

Reference temperature

25[deg]

 

Set the Mesh Tab as follows.

Tab

Setting Item

Settings

Mesh

Meshing Setup

Automatically set the general mesh size: Deselect

General mesh size: 2[mm]

Model

A helical solid body Coil (coil) is defined.

“Ambient air creation” is selected by default.

The automatically created ambient air is analyzed only in the magnetic field analysis, not in the thermal analysis.

Body Attributes and Materials

Finer meshes are set on the area where the magnetic field changes drastically.

Body Number/Type

Body Attribute Name

Material Name

Mesh Size

0/Solid

Coil

008_Cu *

3

* Available from the Material DB

 

Body attribute is set up as follows to apply current to the coil.

Body Attribute Name

Tab

Settings

Coil

Current

Current: 100[A]

Turns: 1[Turns]

Boundary Conditions

“Natural convection (automatic calculation)” is set on the outer boundary condition (surrounding the coil in the case of the thermal analysis).

Boundary Condition Name/Topology

Tab

Boundary Condition Type

Settings

Outer Boundary Condition *

Thermal

Heat Transfer/Ambient Radiation

Natural convection (automatic calculation)

Room Temperature : 25[deg]

 

To set Outer Boundary Condition, go to the [Model] tab
 


 

and click [Outer Boundary Condition] .

Results

The vectors of the magnetic field are shown below.

 

The vectors of the current density are shown below.

The current is flowing as set for the coil.

 

The temperature contour as a result of Watt is shown below.

The coil temperature goes up as high as 130[deg].