Will Robertson

Research work

Assorted things that don't belong anywhere any more. Please see my staff directory page for publications and research writings.

Halbach array movies

I made these movies in 2003 for a seminar. The individual frames are magnetostatic solutions from ANSYS, which were all glued together in Quicktime Pro to create the movies.

halbach-build.mov
This movie shows the focussing effect of the magnetic field of a Halbach array as the magnets are moved together
halbach-rotate.mov
This movie shows how the magnetic field of an array changes as the magnetisation directions of the individual magnets are rotated.

Ansys

Turns out I don't like Ansys very much. So there's not much here. I'm much more into Mathematica these days.

There are very few Ansys examples dealing with electromagnetics. I had some initial difficulty working them out so I’ve put some examples up here.

2d-magnet.mac
The flux lines of permanent magnet in 2D.
2d-electromagnet.mac
The same as above but for an electromagnet.
3d-magnet.mac
Permanent magnet in 3D. Points of interest: must use free meshing (not mapped); uses annotation to display the magnetisation direction; plots the magnetic flux with vectors (field lines aren't available in 3D).

I had to modify ansys-mod.el to get it to work with a new version of emacs. I didn’t know what I was doing, but it works passably now. See the result here. Unfortunately the original file is no longer being maintained. If you come across a copy that works correctly, I'd love to hear it.