German

FAQ

FAQ PS-PERMAG

1. Which sorts of magnets can be tearted with PS-PERMAG ?

Calculations can be done on different classes of  three dimensional permanent magnets. These sorts of magnets differ by their geometry and their specific sort of magnetization.

Momentarily PS-PERMAG supports the following basic classes of magnets:

  • Diametrically magnetized cylinders: Pole number per pole face 2
  • Multipolar circumferentially magnetized cylinders: Pole number per pole face 4 to 256
  • Multipolar laterally magnetized cylinders: Pole number per pole face 4 to 256
  • Multipolar axially magnetized cylinders: Pole number per pole face 1 to 256
  • Multipolar axially magnetized cylinder segments with irregular poles and segmented gaps: Pole number per pole face 1 to 8
  • Multipolar cylinders with axially lateral  magnetization: Pole number per pole face 4 to 256.
  • Multipolar homogeneously magnetized blocks (cuboids): Pole number per pole face 1 to 256
  • Multipolar homogenously magnetized block segements with irregular poles and segmented gaps: Pole number per pole face 1 to 8
  • Multipolar radially magnetized cylinders, Pole number per pole face 1 to 256
  • Multipolar radially magnetized cylinder segments with irregular poles and segmented gaps: Pole number per pole face 1 to 8.
  • Halbach magnets with continuous or discrete distribution of polarization: Poles per pole face 2 to 36
  • Multipolar homogeneously magnetized configurations for rotational machines, inner and outer rotors, pole number per pole face 2 to 256
  • Multipolar radially magnetized configurations for rotational machines, inner and outer rotors, pole number per pole face 2 to 256
  • Diametrically magnetized sensormagnets with ledges and depressions
  • Two pole sensormagnets with ledges and depressions and axial-homogeneous magnetization
  • Two pole sensormagnets with ledges and depressions and axial-lateral magnetization

2. Which magnetic materials can be treated ?

Nearly all sorts of current  permanent magnetic materials can be treated. I.e. all sorts of permanent magnetic Ferrites, sintered or bonded NdFeB, sintered or bonded SmCo, bonded SmFeN. Not treatable is Alnico due to its steep demagnetization curve, which does not fit to the model of rigid magnetization, which is the basis of PS-PERMAG.

3. Which sorts of results are provided by PS-PERMAG ?

All three spatial components of the magnetic field produced by the magnet, the absolute value of the field as well as the angles with the axes of the respective coordinate system are computed. The field components can be shown in cartesian as well as in cylindrical coordinates. Additionally the extreme values of the field as well their integrals are calculated by the software. By using PS-PERMAG also Fourier analyses for periodic and non periodic field configurations can be performed. The data will be presented graphically as a function of spatial locations and as numerical listings. For systems which include soft magnetic plates also attracting forces on the permanent magnets can be computed. In configurations describing electrical machines additionally machine respond curves may be calculated.

4. On which locations does PS-PERMAG compute the magnetic results

On user defined paths inside or outside the magnet. The shape of the path can be chosen as straight or circular line for all sorts of magnets.

5. By which accuracy are the fields computed ?

The fields can be computed by a user defined numerical accuracy ranging from 10-8 T to 1T. The default value is 10-4T (=1G).

6. How do I define a problem ?

By simply typing the magnets dimensions, its number of  poles and its remanence into a dialog box. Further you have to put in a few data for the path on which the results should be given. E.g. for a circular path  these are its radius and its axial location. Then the computation of the field components and their secondary results can be started. The computational process itself generally needs a few seconds only.

7. Can the results be used with other software ?

Yes. PS-PERMAG has an export function to store the computed field components in ASCII code. So they can be used e.g. in spreadsheet programs.

8. What are the differences of PS-PERMAG to other programs ?

The main differences to other programs, which usually are on the basis of finite elements, are the fast and easy usability of PS-PERMAG as well as its very low price.  

9. Who is the author of PS-PERMAG

PS-PERMAG is written by the physicist Thomas Schliesch, Germany who has nearly three decades of experience in the development and simulation of permanent magnets and magnetic systems.

10. How can I be sure that PS-PERMAG works accurately ?

PS-PERMAG has been tested intensively in respect of all treated sorts of magnets. Its results were both  judged by comparison with practical measurements as well as by comparison with FEM analyses. In all cases we found good to excellent agreements only.