Talk:Circuit topology (electrical)

Question
Is there a better way to present the topology diagrams. A lot of whitespace is present on my computer. Maybe make them smaller, put them in multiple image templates or a gallary. It would greatly improve the appearance of the article in my opinion. AIR corn (talk) 02:22, 5 February 2012 (UTC)
 * I assume you are talking about the first part of the article, not the large section on graph theory that I recently added. The fundamental problem is that there is more diagram than text.  To keep the text with the diagram to which it relates will inevitably result in whitespace.  By all means try and improve, but any kind of gallery is going to need the text to be changed to refer to the figure numbers.  This in turn will force the reader to scroll up or down to find them, in my opinion not really an improvement.  Spinning  Spark  10:26, 5 February 2012 (UTC)

Power electronics, inverter (electrical) & variable-frequency drive topologies?
Noting recent GA upgrade of this article as well as of variable-frequency drive article, I suggest need to consider extension of Topology (electrical circuits) article to include some sort of treatment of power electronics topologies generally and inverter (electrical) and variable-frequency drive topologies in particular.Cblambert (talk) 20:20, 26 May 2012 (UTC)

Tetrahedral Topology
Some of the topologies shown cry out to be seen as tetrahedral rather the planar. For example, Figures 1.6 and 1.8.

I have searched using Google but not with the aid of a skilled librarian, and could not find an association of bridge networks with a tetrahedron. It is difficult for me to believe that no association has been noticed before mine.

I am now getting long in tooth and not really up with how to prepare an article for Wikipedia. I hope what I report will be interesting enough for someone to follow up. I am willing to be helpful. I will send a PowerPoint presentation I presented to a small group if someone shows interest.

The classic Wheatstone bridge diagram *Figure 1.8) has a tetrahedral topology. The battery and galvanometer are on a pair of edges that do not touch directly. Resistors along the remaining four edges of the tetrahedron connect them. Balanced bridges of this nature are used as hybrid circuits so that a potential introduced in a (batter) arm does not produce a current in the indirectly connected (galvanometer) arm.

The diagram (Figure 1.6) also is the projection of a tetrahedron. It is possible to balance three bridges in this configuration. They are balanced if the wye and its equivalent delta are connected as in the diagram. This means that three hybrid connections can be made from one tetrahedral circuit. That is, an emf introduced in one (battery) arm, will not produce a current in the opposite (galvanometer) arm. I have seen that used in some telephone circuits to isolate two separate signals.

I would appreciate a response whether positive or negative. Is there a publication that has noted this topological property before? PEBill (talk) 08:09, 4 March 2013 (UTC)


 * A bridge is indeed a tetrahedron, but I am not aware of any significance in the congruence of a topology to any 3D figure. What is significant is whether or not the topology will map on to a plane.  I think it is true that any closed (genus 0) polyhedron will map on to a sphere (it is certainly true for convex polyhedra like the tetrahedron) and will therefore also map on to a plane.  The dual of such topologies is guaranteed to exist, but beyond that I don't think it has any significance for topology.  Spinning  Spark  20:48, 4 March 2013 (UTC)

U.R.L.s ?
Hi, Spinning Spark, What objection do you have against providing links (u.r.l.s) to articles ? I found links to MacMahan's articles of 1891 and 1892, but you deleted them. I read those articles and I thought that others might also like to read them, but apparently you don't want other people to access them. Why? What's the problem? VexorAbVikipædia (talk) 16:21, 28 January 2015 (UTC)
 * But the links you provided are not to places where the articles can be read. I thought I explained that adequately in my edit summary "Links to gbooks that don't give preview are useless, and in the case of The Electrician, the doi links to a full access source." SpinningSpark 19:26, 28 January 2015 (UTC)