FAQ PSPERMAG
1. Which sorts of magnets can be analyzed by PSPERMAG ?
Analyses 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. The most classes can have different numbers of poles ranging between 2 to more than 200 poles per pole area.
Momentarily PSPERMAG maintains the following basic classes of magnets:
 Diametrically magnetized cylinders: Pole number per side 2
 Multipolar circumferentially magnetized cylinders: Pole number per side 4 to 256
 Multipolar laterally magnetized cylinders: Pole number per side 4 to 256
 Multipolar axially magnetized cylinders: Pole number per side 1 to 256
 Multipolar axially magnetized cylinder segments with irregular poles and segment gaps: Pole number per side 1 to 8
 Multipolar cylinders with axially lateral magnetization: Pole number per side 4 to 256.
 Multipolar homogeneously magnetized blocks (cuboids): Pole number per side 1 to 256
 Multipolar homogenously magnetized block segements with irregular poles and segement gaps: Pole number per side 1 to 8
 Multipolar radiallly magnetized cylinders, Pole number per side 1 to 256
 Multipolar radially magnetized cylinder segments with irregular poles and segment gaps: Pole number per side 1 to 8.
 Halbach magnets with continuous or discrete distribution of polarization: Poles per side 2 to 36
 Multipolar homogeneously magnetized configurations for rotational machines, inner and outer rotors, pole number per side 2 to 256
 Multipolar radially magnetized configurations for rotational machines, inner and outer rotors, pole number per side 2 to 256
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 PSPERMAG.
3. Which sorts of results are given out by PSPERMAG ?
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. The field components can be shown in cartesian as well as in cylindrical coordinates. Additionally the extreme values of the field as well their its integrals are computed by the software. By using PSPERMAG also Fourier analyses for periodic and non periodic field configurations can be performed. The data can be watched graphically as a function of spatial location or 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 can be calculated.
4. On which locations does PSPERMAG compute the magnetic results
On user defined paths inside or outside the magnet. The shape of the path can be chosen as straight line or circular 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^{4}T (=1G).
6. How do I give in a problem ?
By simply typing the magnets dimensions, its pole number and its remanence into a dialog box. Further you have to type 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. PSPERMAG has an export function to store the computed field components in ASCII code. So they can be used e.g. in scientific data handlers or spreadsheet programs.
8. What are the differences of PSPERMAG 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 PSPERMAG as well as its very low price.
9. Who is the author of PSPERMAG
PSPERMAG is written by the physicist Thomas Schliesch, Germany who has more than two decades of experience in the development and analysis of permanent magnets and magnetic systems.
10. How can I be sure that PSPERMAG works accurately ?
PSPERMAG has been tested extensively in all treated sorts of magnets. Its results were both judged by comparison with practical measurements as well as with FEM analyses. In all cases we found good to excellent agreements only.
