MATLAB Toolbox for Power Magnetics: Model and Optimization

ThisMATLAB toolboxallows for themodeling and optimizationof powermagnetic components:

• medium-frequencyinductors
• medium-frequencytransformers
• computation of themass and volume
• extraction of theequivalent circuit
• computation of thecore and winding losses
• fast and accuratesemi-numerical methods
• plotting of the winding and core geometries
• brute-forceoptimization(parallel code)
• flexibleobject-orienteddesign

The following methods/functionalities are provided for thecore modeling:

• iGSE for the core losses (with locally fitted parameters from a loss map)
• linear reluctance solver with 3D air gap models
• multiple air gaps are allowed
• multiphases components are allowed

The following methods/functionalities are provided for thewinding modeling:

• mirroring method with inductance matrix and field evaluation (with/without air gaps)
• solid wire windings (including skin and proximity losses)
• stranded (Litz) wire windings (including skin and proximity losses)
• multiple air gaps are allowed
• multiphases components are allowed
• model of the winding heads

Currently, the followingcomponents are implemented:

• inductors and two-winding transformers with shell-type windings
• U-core, C-core, and E-core

However,additional componentscan be added by implementingabtract classes. More specifically, the code could handle the following cases (without modifying the core classes):

• multiphase components (transformers or chokes)
• other winding geometries (core-type, matrix, etc.)
• other core geometries (ELP, RM, etc.)
• distributed airgaps

开始

Two DC-DC converters are considered as examples:

• a resonant converter (SRC-DCX) with a MF transformer
• a bidirectional Buck converter (Buck DC-DC) with a MF inductor

Both converteres are operating between 400V and 100V buses with a rated power of 5kW. The component geometry (core and windings) and the operating frequency are optimized.

The example consists of the following files:

• resonant converter (SRC-DCX) with a MF transformer
  • run_1_src_dcx_single.m- modelization of a single design
  • run_2_src_dcx_combine.m- brute-force optimization of the component
  • run_3_src_dcx_plot.m- optimization results (Pareo fronts
• bidirectional Buck converter (Buck DC-DC) with a MF inductor
  • run_1_buck_dcdc_single.m- modelization of a single design
  • run_2_buck_dcdc_combine.m- brute-force optimization of the component
  • run_3_buck_dcdc_plot.m- optimization results (Pareo fronts)
• example_files- definition of the parameters, materials, and waveforms

Gallery

Buck DC-DC Inductor

SRC-DCX Transformer

Pareto Fronts

Toolbox Organization

磁工具箱包含以下packages:

• add_path_mag_tb.m- add the toolbox to the MATLAB path
• core- core reluctance and core losses
  • core/README.txt- package documentation
  • core/DATA_STRUCT.txt-数据形式at documentation
  • core/core_class.m- main class
  • core/core_lib- package internal classes
  • core/core_example- example/test files
• window- winding window stray field and winding losses
  • window/README.txt- package documentation
  • 窗口/ DATA_STRUCT.txt-数据形式at documentation
  • window/window_class.m- main class
  • window/window_lib- package internal classes
  • window/window_example- example/test files
• component- simulation of complete components (inductor or transformer)
  • component/README.txt- package documentation
  • component/DATA_STRUCT.txt-数据形式at documentation
  • component/component_class.m- main class
  • component/component_lib- package internal classes
  • component/component_example- example/test files
• sweep- simulation of design sweeps (brute-force optimization)
  • sweep/README.txt- package documentation
  • sweep/get_sweep_single.m- simulating a single parameter combination
  • sweep/get_sweep_combine.m- simulating a many parameter combinations
  • sweep/sweep_lib- package internal functions
  • sweep/sweep_example- example/test files

Compatibility

• Tested with MATLAB R2015b and R2021a.
• Parallel Computing Toolbox.
• Compatibility with GNU Octave not tested but probably problematic.

Author

Thomas Guillod-GitHub Profile

This toolbox shares some files/ideas with the following repositories:

• mirroring_method_matlab- ETH Zurich, Power Electronic Systems Laboratory, T. Guillod, BSD License
• litz_wire_losses_fem_matlab- ETH Zurich, Power Electronic Systems Laboratory, T. Guillod, BSD License

License

This project is licensed under theBSD License, seeLICENSE.md.