Rotating Fields in Electrical Machines - Animations

Description

Under construction.

Warning

These Java animations are LARGE and make heavy demands both on the machine where the Java code is running and on the X server (if different).

If you are browsing these demos in your own time, please note:

• Be patient - it will take a moment to load each animation.
• Do not continue if the machine you are logged in to is currently timetabled for teaching use.
• The animations may fail to display if there is insufficient memory available.

Viewing with a Java-capable web browser

The animations have been tested using Netscape version 3. Ideally, you should be using a screen resolution of 1024x768 or better, with your browser window maximised to the whole screen.

Follow these links straight to the animations:

• Single phase (alternative colour scheme)
• Three phases (alternative colour scheme)

Viewing with Appletviewer

This may be a better option on a teaching system X terminal. Use the following commands:

Single phase

appletviewer http://www-h.eng.cam.ac.uk/help/mjg17/teach/rotate/phase-a.html

Single phase (alternative colour scheme)

appletviewer http://www-h.eng.cam.ac.uk/help/mjg17/teach/rotate/phase-a-c.html

Three phase

appletviewer http://www-h.eng.cam.ac.uk/help/mjg17/teach/rotate/all.html

Single phase (alternative colour scheme)

appletviewer http://www-h.eng.cam.ac.uk/help/mjg17/teach/rotate/all-c.html

Technical notes

The Java animation code is based on examples included with Sun's JDK. To obtain sufficient performance, each animation consists of a single GIF image containing a strip of twenty frames. This is clipped to display each frame in turn.

The flux contour plots and the graphs of airgap flux density were produced using SLIM and a finite-element model written by Albert Wong. The graphs of currents were produced from a small Java applet.

Each graph for each frame was captured as an X screen dump. The three components of each frame were assembled into a composite frame, and then the frames were assembled into a single strip, using pnmcat and other utilities from the NetPBM suite of tools.

Copyright and Disclaimer

This software is Copyright (C) 1996, 1997, 1998 University of Cambridge Department of Engineering and Michael Gray, (C) 1996 Stephen Williamson and Albert Wong. It may not be used, copied or distributed without permission.

This software is offered "as is". No promises are made as to what it will do. No liability will be accepted for damages arising out of the use of or inability to use this software.