PS-PERMAG - Software for Analysis of Permanent Magnets

PS-PERMAG in its current version 3.0 enables the user to do easy and fast analyses of the fields originated by permanent magnets. In general expensive FEM software is used for this purpose, which demands many efforts and lots of knowledge. Such programs generally can be handled by specialists only. In contrast  the software PS-PERMAG offers the computation of 3D field distributions by simple input of the magnets dimensions, its remanence induction and its pole number. PS-PERMAG supplies this for the most usual geometric versions of permanent magnets.


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PS-PERMAG 3.0 shows the following characteristics:

easy definition of the problem by input of geometry, pole number and remanence

immediate 3D computation of all  field components, absolute field value and other parameters

analysis internal and external to the magnet

handling of thirteen different sorts of permanent magnets with adjustable pole configurations up to 256 poles

now with cylinders and cuboid segments with irregular pole patterns

including soft magnetic materials and forces for specific sorts of magnets, now in addition with configurations for electrical machines

computation of characteristic curves for DC machines

computation of field angles with axes of  result coordinate systems

Fourier analysis of periodic and non periodic field distributions

circular and linear field paths for all sorts of magnet configurations, selectable result coordinates

graphical diagrams as well as listings in tabular form

ASCII export for using the results in external software

extensive HTML help system

The following sorts of magnetic geometry are supported in the current version 3.0 of PS-PERMAG:

(np poles per pole area)


D - diametrical cylinders

M - circumferentially multipolar cylinders



np=4 to np=256

L - laterally multipolar cylinders

R - radially multipolar cylinders


np=4 to np=256 

np =1 to  np=256


H - multipolar cylinders due to the Hallbach principle, continuous or segmented magnetization (np=2  to np=120, number of segments per pole 1 to 40 )


Example: np=2 with 8 segments per pole


A - axially multipolar cylinders, also with soft magnetic plates of adjustable distance and computation of attracting force (np=1 to np=256 )


Example: np=10

Example:  np=6 with soft magnetic plate


AS - axially magnetized cylinder segments of irregular pol patthern, also with soft magnetic plates of adjustable distance and computation of attracting force (np=1 to np=8 )


Example: Segment with np=10

Example: cylinder with irregular pole pattern, np=2

Axial segments with irregular pole pattern on softmagnetic plate np=5

AL - Axially lateral (bow shaped) magnetized cylinders oder cylinder rings (np=4 to np=256 )

Beispiel: Zylinderring np=8


2DM, 2DR - 2D-Models for electrical machines, magnetization circumferentiallly multipolar and radially multipolar, inner and outer rotor assemblies (np=2 to np=256 )


Example:  np=10, inner rotor


Example:  np=10, outer rotor


C - Homogeneously multipolar cuboids, also with soft magnetic plates of adjustable distance and computation of attracting forces (np=1 to np=256 )


Example: axial cube, np=1

Example: 8 -polar magnetized plate

Example: Four pole magnet above soft magnetic plate


CS - multipolar  bar segments with irregular poles, also with soft magnetic plates of adjustable distance and computation of attracting force (np=1 to np=8)


Examples: Magnetic strip np=3

Example: two cuboids with np=2 each


Examples: Irregularly poled segements with gap above soft magnetic plate


RS - radially magnetized cylinder segments of irregular pol patthern (np=1 to np=8 )

Example: Two segments of different size separated by an air gap


The following magnetic materials are treated:

All modern permanent magnetic materials, i.e.:

Ferrites, NdFeB, SmCo, SmFeN. It is not advisable to use PS-PERMAG for  magnets made of Alnico or for magnetically semi hard materials. These materials show highly bent demagnetization curves, that do not fit to the model of rigid magnetization being used by PS-PERMAG.