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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Links of the Week 9-14

Saturday Stories!

Links of the Week 8/3

Saturday (sometimes space) stories!

  • This project seems pretty awesome (and related to my area of research), but I wonder if it is any more than patents and pictures?
  • Are there tiers of worry like there are tiers of comfort? We now have the luxury to worry about pollution and asteroids instead of tigers and starving.