PyPEEC - 3D Quasi-Magnetostatic Solver

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PyPEEC is a 3D quasi-magnetostatic PEEC solver developed at Dartmouth College within the Power Management Integration Center (PMIC). PyPEEC is a fast solver (FFT and GPU accelerated) that can simulate a large variety of magnetic components (inductors, transformers, chokes, IPT coils, busbars, etc.). The tool contains a mesher (STL, PNG, and GERBER formats), a solver (static and frequency domain), and advanced plotting capabilities. The code is written in Python and is fully open source!


PyPEEC features the following characteristics:

  • PEEC method with FFT acceleration

  • Representation of the geometry with 3D voxels

  • Multithreading and GPU acceleration are available

  • Fast with moderate memory requirements

  • Import the geometry from STL, PNG, and GERBER files

  • Draw the geometry with stacked 2D vector shapes or voxel indices

  • Pure Python and open source implementation

  • Can be used from the command line

  • Can be used with Jupyter notebooks

  • Advanced plotting capabilities

PyPEEC solves the following 3D quasi-magnetostatic problems:

  • Frequency domain solution (DC and AC)

  • Conductive and magnetic domains (ideal or lossy)

  • Isotropic, anisotropic, lumped, and distributed materials

  • Connection of current and voltage sources

  • Extraction of the loss and energy densities

  • Extraction of the current density, flux density, and potential

  • Extraction of the terminal voltage, current, and power

  • Computation of the free-space magnetic field

PyPEEC has the following limitations:

  • No capacitive effects

  • No dielectric domains

  • No advanced boundaries conditions

  • No model order reduction techniques

  • Limited to voxel geometries

The PyPEEC package contains the following tools:

  • mesher - create a 3D voxel structure from STL or PNG files

  • viewer - visualization of the 3D voxel structure

  • solver - solver for the magnetic field problem

  • plotter - visualization of the problem solution


The geometry is meshed with a regular voxel structure (uniform grid). Some geometries/problems are not suited for voxel structures (inefficient meshing). For such cases, PyPEEC can be very slow and consume a lot of memory.


Dartmouth and PMIC