https://github.com/otvam/resistance_inductance_matrix_matlab

MATLAB Code for Extracting Resistance/Inductance Matrices
https://github.com/otvam/resistance_inductance_matrix_matlab

energy finite-element-analysis inductor losses matlab matrix power-electronics resistance transformer

Last synced: 5 months ago
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MATLAB Code for Extracting Resistance/Inductance Matrices

• Host: GitHub
• URL: https://github.com/otvam/resistance_inductance_matrix_matlab
• Owner: otvam
• License: bsd-2-clause
• Created: 2021-11-04T01:51:04.000Z (over 4 years ago)
• Default Branch: master
• Last Pushed: 2024-12-18T04:45:18.000Z (over 1 year ago)
• Last Synced: 2025-03-28T00:41:25.827Z (over 1 year ago)
• Topics: energy, finite-element-analysis, inductor, losses, matlab, matrix, power-electronics, resistance, transformer
• Language: MATLAB
• Homepage:
• Size: 13.7 KB
• Stars: 3
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE.md

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README

          
# MATLAB Code for Extracting Resistance/Inductance Matrices

![license - BSD](https://img.shields.io/badge/license-BSD-green)

![language - MATLAB](https://img.shields.io/badge/language-MATLAB-blue)

![category - power electronics](https://img.shields.io/badge/category-power%20electronics-lightgrey)

![status - unmaintained](https://img.shields.io/badge/status-unmaintained-red)

This **MATLAB code** extracts the **resistance/inductance matrix** of a system:

* Different **operating points** are provided (measured or simulated current excitations).

* The associated **losses/energies** are provided (measured or simulated values).

* The corresponding resistance/inductance matrix is **extracted**.

The following the **quadratic form** is linking the aforementionned variables:

* `U = 0.5*I_vec'*Q_mat*I_vec`

* `I_vec` is the vector containing the applied currents

* `Q_mat` is the resistance/inductance matrix

* `U` is the loss/energy value

This code is handling the following cases:

* `n_op` is the number of provided operating points

* `n_var` is the number of independent coefficients for the resistance/inductance matrix

* `n_op invalid problem

* `n_op==n_var`: determined equation system => linear equation system

* `n_op>n_var`: over-determined equation system => least-square fit

The condition number of the equation system and the residuum are computed.

This is required to ensure that the resistance/inductance matrix is numerically robust.

Finally, the code checks that the extracted matrix is physical (symmetric and positive definite).

## Compatibility

* Tested with MATLAB R2021a.

* No toolboxes are required.

* Compatibility with GNU Octave not tested but probably easy to achieve.

## Author

**Thomas Guillod** - [GitHub Profile](https://github.com/otvam)

## License

This project is licensed under the **BSD License**, see [LICENSE.md](LICENSE.md).