Spinning > Not Spinning

The changing component of the magnetic fields that produce eddy currents can come from two sources: a relative velocity between the field and the target or change in the strength of the field itself. For a number of reasons the bulk of EC actuation research has focused on the latter mechanism. Time-varying electromagnets are easier to both analyze and implement.

However, two motors spinning magnets to create eddy-currents through moving magnetic fields may be able to achieve something that is much harder with electromagnets: attraction AND repulsion without a complicated scheme.

The motor-magnet actuator says to the plate: “come here”

“Now go away”

Combine that with “sashay left and right”

And you just may be able to dance with a spaceship.

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