Levitation by induction
To demonstrate levitation by induction, I have cut down a large transformer to allow an external field. It was 240 V to 110 V and rated at 2 kVA. I use the two windings in series. When run from DC it draws 15 A at 30 V or 450 W. This is enough to levitate a large NIB magnet about 17 cm away. This simple arrangement is not able to give stable levitation however but demonstrates the field strength.
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Here AC at 0.99 amp is used to induce a current in the disc which is repelled and lifted.
The aluminium disc is in place, and the disc being levitated. The central drinking straw is to stop the disc sliding off. This is not stable levitation without some minor directional support. There is a lot of power going into the induced field in the disc which gets hot after a while. It can be spun freely.
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External links
Levitation by induction – YouTube
Photo Date: Nov 13, 2006