| 摘要 |
During induction heating of a billet of an electrically conducting material by rotating the billet relative to a magnetic field that is generated by means of at least one direct-current-carrying superconducting winding on an iron core, the reverse-induction voltage can be reduced when a direct current is generated and maintained in the winding at a value that generates in the iron core at least in the region of the winding a magnetic flux density at which the relative permeability of the material of the iron core is less than in a zero-current state of the winding.
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