---
title: Mixed A- and H- formulation for modeling electrical machines with superconducting windings
description: "HTS Modelling Workgroup | Model files\nMixed A- and H- formulation for modeling electrical machines with superconducting windings"
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# Mixed A- and H- formulation for modeling electrical machines with superconducting windings

 by [**administrator**](https://htsmodelling.com/model-files/author/administrator) on Mar 15, 2024, 1:20:57 PM

![J_animation-1](https://htsmodelling.com/hs-fs/hubfs/model-files/16-a-mixed-a-and-h-formulation-approach/J_animation-1.gif?width=640&height=480&name=J_animation-1.gif)

The model uses the H-formulation for the superconducting windings and the A-formulation for the non-superconducting parts. Two important lines are defined: the “tramodel” lines, which separates the two formulations, and the “rotation” line, which separates the fixed and rotating parts.

**This model was shared by R. Brambilla, Ricerca sul Sistema Energetico, Italy.**

Downloads

[Comsol, version 5.3](https://htsmodelling.com/hubfs/model-files/16-a-mixed-a-and-h-formulation-approach/Downloads/OneBar_U%26HK_v53_example.zip)

References

1. [Brambilla et al., 2018 IEEE Trans. Appl. Supercond. 28 (5) 5207511](https://doi.org/10.1109/TASC.2018.2812884)

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