Physical Process Modeling


ac/dc module

    AC power electromagnetics problems are common when studying motors, transformers, and conductors carrying alternating currents.
    To derive the equation system this mode solves, start with Ampere's law,


    Now assume time-harmonic fields and use the definitions of the potentials,


and combine them with the constitutive relationships B = o(H+M) and D = oE+P to rewrite Ampere's law as:

Maxwell equations

Created by Physical Process Modeling

This module solves problems in the general areas of electrostatic fields,
magnetostatic fields, and quasi-static fields

For example - find the heat distribution in a motor:
1.   first find the current in the coils using one of the
quasi-static application modes in this module,
2.   and then couple it to a heat equation in the
Heat Transfer Module.

The sections contain useful information: references, articles and so on with regard to the relevant section. The Physical Process Modeling team does not claim authorship. The sources are given here.
The materials in this section are authorship of the Physical Process Modeling team. They are presented in abridged form without additional explanations to them. For more information, contact us.

  Reference book: Units, Mathematics And Physical Quantities
Heat Transfer Bimetal


  Reference book: Theory Part I
HeatTransfer cable

  Reference book: Theory Part II
movie 1     movie 2

Energy stored in an electromagnetic field:

  Magnetic energy in a nonmagnetic medium
  Magnetic energy stored in an inductor

contacts modeling

Study of design and technology errors in ozone generating stations

    Low volatage three phase inverter using IGBT


The paper dwells on the study of low voltage three phase inverter using IGBT, intended for AC motor drives for electric trucks. The losses in the main inverter components have been calculated as well as their dependence on the current frequency and the power factor. The test results with sinusoidal PWM are given.

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radiator heat transfer     radiator heat transfer    

AC/DC Module. Modeling, Analysis and Design.