Force between Magnet and Electromagnet (Axisymmetric Analysis)examples|products|Murata Software Co., Ltd.

Example25 Force between Magnet and Electromagnet (Axisymmetric Analysis)

General

  • This exercise solves Exercise 7 with axisymmetric analysis.
    The number of meshes is much less with axisymmetric models, so the simulation time is shorter.
     

  • The electromagnetic force, the current density, and the vectors of magnetic field and the magnetic flux density are solved.
     

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

 

Analysis Space

Item

Settings

Analysis Space

Axisymmetric

Model unit

mm

Analysis Conditions

Item

Settings

Solver

Magnetic Field Analysis [Gauss]

Analysis Type

Static analysis

Options

N/A

 

Model

A cylindrical magnet is placed on top of the iron core (Fe) of the electromagnet.

 

Mesh size is set at 1[mm] as the magnetic field changes drastically between the magnets.

 

  • Set the gap between the bodies and mesh size properly to obtain valid calculation results.
    See [Calculation of the Electromagnetic Force] for more details.

 

Body Attributes and Materials

Body Number/Type

Body Attribute Name

Material Name

0/Sheet

Core

Core

2/Sheet

Coil

008_Cu *

1/Sheet

Mag

Mag

* Available from the Material DB

 

The material properties are set up as follows:

Material Name

Tab

Properties

Mag

Permeability

Material Type: Permanent Magnet

Magnet

Magnetization Strength: 0.5

Core

Permeability

Relative Permeability: 5×10^3

 

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

Body Attribute Name

Tab

Settings

Coil

Current

Waveform: Constant

Current: 1[A]

Turns: 100[Turns]

Direction: +Y direction

Boundary Conditions

No setting.

Results

To see the electromagnetic force, go to the [Results] tab

 

 

 click [Table] .

 

Two magnets are pulling each other with the approximate force of 1.2[N] in the Z direction.

 

Shown below are the vectors of the current density flowing through the loop coil.

 

The vectors of the magnetic field are shown below.

 

 

The vectors of the magnetic flux density are shown below.