In reply to Horace Heffner's message of Fri, 7 Mar 2008 23:48:10 -0900: Thanks Horace, [snip] >If both tori have an >odd number of winding layers, or even if multiple winding layers are >used but all or most proceed in the same major axis direction, or >some combination of the above resulting in a net major axis current >hoop, then they both carry a significant external magnetic field >equivalent to hoop coils about their major axes. A pair of tori with >such equivalent hoop coils will exhibit significant mutual forces and/ >or torques depending on location and orientation. Note that such >forces can be larger than just the force between the major axis hoop >currents, because flux from one hoop coil can enter the "cake of the >doughnut" volume of the adjacent torus, and thus interact with the >flux there (or be viewed as interacting with the small radius >windings) to produce much larger forces than might otherwise be >anticipated. This also means unexpected force interactions can arise >between a major axis hoop current carrying torus and a torus not >having such a hoop equivalent current, including a permanent magnet >torus in which all flux is internal. Flux repels (or attracts) >parallel flux via magnetic pressure.
This is along the lines of what I am trying to get at, though I was thinking more of interactions between the individual minor axis loops of one torus with individual minor axis loops of the other (however I could easily be wrong about that). Regards, Robin van Spaandonk The shrub is a plant.
