.... but making the region of increased permeability "move" can't be accomplished with static fields as they are homogenous
This thought will crash most ideas and I find it incorrect. Static fields are just vector measurements of variations in one singular medium which is the stuff that makes up all fields of a type and perhaps all types. If this wasn't true a compass would not work. Adding a magnet to a ferrous cored coil has definite and undeniable effects upon the properties of the coil. Bringing a magnet near an air-cored coil while current is pulsed into that coil causes the conductors to move farther and with more force. Using FEMM just increase the surrounding plotted space. You will see that any good FEMM program will link the so-called 'magnet's field' to any nearest magnetic field and continue to connect filed lines to the planet's poles and those to the Sun and beyond. A magnet just focuses flux no different than a lens focuses light. It isn't the source of whatever it is focusing. It is just the source of that mathematical construct we call a field. If you use the compression effect between pulses of different velocities you create a third pulse of the same polarity as the colliding pulses but with much higher amplitude. Should this stronger resultant pulse be in a static magnetic field the motion and force of movement is multiplied magnitudes higher than either of the generated pulses. It cannot be denied that a TPU was connected to the Earth's magnetic field. That doesn't mean it was powered by the planet's field.
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