parallel coils
Some maglev trains have a Halbach Array on the bottom of the train and the track is embedded with coils under the magnets. The coils are permanently shorted coils. Basically one big fat winding where both ends are connected. You run the magnet over that and it creates a strong magnetic repulsion from the coil that pushes the magnets away and pushes the train in the air. And that magnetic field lasts longer than normal.
The coils here, Bob Teal's, etc... some magneto systems that shorts the coil... are of course not permanently shorted. But the point is, parallel coils are ultra low impedance so they can charge really fast and strong. (magneto systems aren't parallel coils but the coil gets shorted sometimes, intentionally)
But what happens after you take the power away? Parallel coils are shorted into each other.
Back EMF can work against you, but then again, it can work for you if you want it to. And I do mean the real Back EMF and not the inductive spike of course.
Maybe Bob Teal deserves another look too.
Some maglev trains have a Halbach Array on the bottom of the train and the track is embedded with coils under the magnets. The coils are permanently shorted coils. Basically one big fat winding where both ends are connected. You run the magnet over that and it creates a strong magnetic repulsion from the coil that pushes the magnets away and pushes the train in the air. And that magnetic field lasts longer than normal.
The coils here, Bob Teal's, etc... some magneto systems that shorts the coil... are of course not permanently shorted. But the point is, parallel coils are ultra low impedance so they can charge really fast and strong. (magneto systems aren't parallel coils but the coil gets shorted sometimes, intentionally)
But what happens after you take the power away? Parallel coils are shorted into each other.
Back EMF can work against you, but then again, it can work for you if you want it to. And I do mean the real Back EMF and not the inductive spike of course.
Maybe Bob Teal deserves another look too.
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