[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

# [femm] Axis-symmetric modelling

- To: <femm@egroups.com>
- Subject: [femm] Axis-symmetric modelling
- From: "Peter J. Ellis" <peter.ellis@paradise.net.nz>
- Date: Tue, 2 Nov 1999 16:22:36 +1300
- Delivered-to: listsaver-of-femm@egroups.com
- Delivered-to: listsaver-egroups-femm@egroups.com
- Mailing-list: contact femm-owner@egroups.com
- Reply-to: femm@egroups.com

First I would like to congratulate Dave and his co-workers on a first-class piece of work. From the time I was introduced to the FEMM package by one of my colleagues to obtaining validated results from three planar permanent magnet models was just one day. I have a few (constructive) suggestions and a question: It is sometimes useful to be able to divide the air spaces around the magnet and airgap into regions, so that the mesh density can be increased in critical areas. This is easy using Segments or Arc Segments, but I would like to be able to hide these segment lines on the Femm View display and printout, since they are not part of the problem. A provision for suppressing the appearance of selected lines would be a handy user feature,at least at the Femm View stage. It would also be useful to be able to vary the range of colours or equivalent grey tones for the density plot and its legend. This can be a help when preparing output for eg; publication. As a raw beginner, I had some difficulties with lack of explanation inthe manual for specific dialog box requests. In the "Properties for selected block" box, I couldn't understand what the "side length" referred to, untilI connected it with the fact that I had generated over 32000 triangles in one small bounded area! My question concerns the axis-symmetric mode of operation. It seems to me that it should be possible to model a wedge of a cylindrically symmetric system, which is presumably the case for the "axi1.fem" example given. I would like to generate a model based on a cylindrically symmetric permanent magnet, in which the left vertical boundary is the apex of the wedge and coincides with the magnet axis. The magnet field direction is parallelto the cylindrical axis. My efforts so far seem to produce nonsense, probably because I do not yet understand how to set the correct boundary conditions. If someone can provide a simple example I would be grateful. Thanking you in anticipation. Peter Ellis

- Prev by Date: [femm] DC MOTOR DESIGN BOOKS
- Next by Date: [femm] Re: Axis-symmetric modelling
- Previous by thread: [femm] DC MOTOR DESIGN BOOKS
- Next by thread: [femm] Re: Axis-symmetric modelling
- Index(es):
  - Date
  - Thread