Eddy Current Induced on Conductor Shellexamples|products|Murata Software Co., Ltd.

Example16 Eddy Current Induced on Conductor Shell

General

  • External AC magnetic field is applied on a conductor shell . Eddy current on the shell is solved.
     

  • The vectors of the magnetic field and the magnetic flux density are also solved.
     

  • 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

Solver

Magnetic Field Analysis [Gauss]

Analysis Type

Harmonic analysis

Options

N/A

 

The frequency is set to 100[Hz] in the harmonic analysis tab. The external magnetic field is directing the Z direction.

Thus, the external magnetic field is set to be AC with the frequency of 100[Hz].

Tabs

Setting Item

Settings

Mesh Tab

Frequency-Dependent Meshing

Surface treatment for conductors: None

Harmonic analysis

Frequency

Minimum: 1×10^2[Hz]

Maximum: 1×10^2[Hz]

Step

Linear step: Division number: 0

External magnetic field

External magnetic field

X=0, Y=0, Z=7.95774×10^5[A/m]

(=1[Kgauss])

Model

A spherical shell made of copper is placed and the external magnetic field is applied.

The magnetic field is AC as set in the harmonic analysis tab.

Body Attributes and Materials

Body Number/Type

Body Attribute Name

Material Name

3/Solid

Shell

008_Cu *

* Available from the Material DB

Boundary Conditions

When you set the external magnetic field, select magnetic wall as outer boundary condition.

Boundary Condition Name/Topology

Tab

Boundary Condition Type

Settings

Outer Boundary Condition

Electric

Magnetic wall

 

Results

The current density on the shell surface is shown.

Eddy current is circulating around the Z axis.

 

The magnetic field sectioned at YZ plane is shown

The magnetic field is distributed around the shell surface.

There is almost no penetration of the magnetic field into the shell.

The stronger the magnetic filed is, the larger eddy current is.