Home / Examples / Magnetic Analysis (Gauss, Static Analysis/Harmonic analysis) / Example 2: Magnetic Field of Bar Magnet and Magnetic Material

Example 2: Magnetic Field of Bar Magnet and Magnetic Material

General

• The magnetic field generated by a ferrite bar magnet and magnetic material is analyzed.
   

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

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

• Obtain this session's project file. (Right-click and choose 'Save link as')




• Results will vary depending on Femtet version and the PC environment.

 

Analysis Space

Item	Settings
Analysis Space	3D
Model Unit	mm

 

Analysis Conditions

Item	Settings
Solver	Magnetic Analysis [Gauss]
Analysis Type	Static Analysis
Options	N/A

Model

Magnetic material is placed on top of a ferrite bar magnet which was created in the example 1.

The magnetizing direction of the ferrite magnet is +Z by default.

That means the top of the magnet is the north magnet pole and the bottom is the south magnet pole.

Body Attributes and Materials

Body Number/Type	Body Attribute Name	Material Name
0/Solid	mag	mag
2/Solid	softmag	softmag

 

The material properties are set up as follows:

Material Name	Tab	Properties
mag	Relative Permeability	Material Type: Permanent Magnet
	Magnet	Magnetization Strength: 0.5
softmag	Permeability	Relative Permeability 5×103

Boundary Conditions

No setting.

Results

The vectors of the magnetic field in the air are shown below. The magnetic fields of the magnet and the magnetic material are hidden.

 

The vectors of the magnetic field inside the magnet and magnetic material are shown below. The magnetic field in the air is hidden.

At the magnet poles, the directions of the magnetic field are reversed for the inside and the outside of the magnet.

The magnetic field in the iron is quite small.

 

The vectors of the magnetic flux density are shown below.

Inside the magnet, the directions of the vectors of the magnetic flux density are the reversal of those of the magnetic field.

The flux density is high in the magnetic material.