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Förslaget inkom 2011-04-21

Shielding of transformer stray fields in trains

OBS! ANSÖKNINGSTIDEN FÖR DETTA EXJOBB HAR LÖPT UT.
Background

In construction of modern trains there are many requirements on the magnetic stray fields from the train’s electrical components. These stray fields should not disturb neither other components in the train or components outside the train. Another important aspect is that the magnetic field exposure to the passengers shall be below required levels.

One component that creates stray field with high magnitudes is the main transformer in the trains. In a recently manufactured Bombardier train, those fields reached unacceptable high values. Therefore, different metallic shields were evaluated by measurements in order to suppress the fields to acceptable levels.

The task

In this Master Thesis work the following activities are included:

1. Create a realistic 3D model of the transformer.
2. Including relevant surrounding metallic parts in the model.
3. Simulate and calculate the magnetic fields at different distances from the transformer.
4. Evaluate the impact of different metallic shields on those fields.
5. Compare the calculated results with measured results, where they are available.


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