Levitation with Induction
With levitation melting, induction energy creates a force strong enough within the induction coil to allow to counter gravity. The metal part remains in the induction field and heats until it has melted. Levitation melting is ideal for industries that need pure samples, without potential contamination from a crucible.
Induction can be used to achieve the stable electromagnetic levitation of conducting materials. High-frequency oscillating currents in the coil induce currents on the surface of the load. With a specially designed coil, the induced currents interact with the magnetic field to force the load against gravity. The combination of simultaneous levitation and induction heating of the material can be used for levitation melting, a common application of electromagnetic levitation with induction. With no crucible, levitation melting provides a contaminant-free environment for the molten metal. Low contamination makes induction levitation melting ideal for applications which require the highest purity.
While any metal or alloy can be levitated with induction, low density materials, such as aluminum, are most suitable for levitation applications due to their light mass per volume. Typical applications for levitation melting include materials research, and industries which require high-purity metals.
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