Affiliations: [a] Department of Environmental and Energy Sciences Field, Graduate School of Science and Engineering for Research, University of Toyama, Toyama, Japan | [b] Graduate School of Science and Engineering for Education, University of Toyama, Toyama, Japan
Correspondence:
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Corresponding author: Takahisa Ohji, Department of Environmental and Energy Sciences Field, Graduate School of Science and Engineering for Research, University of Toyama, 3190 Gofuku, 930-8555, Toyama, Japan. E-mail: [email protected].
Abstract: In general, the magnetic levitation (maglev) force on a nonmagnetic metal generated by an alternating magnetic field becomes a repulsive force; therefore, the nonmagnetic metal can only be pushed up from below by the repulsive force. In contrast, our prototype device succeeded in continuously pulling up a thin aluminum ring with a diameter of 120 mm by using ac electromagnetic force based on the ac ampere type maglev method we have proposed. This system operates just as if a permanent magnet attracts a magnetic material. This paper describes the configuration of the prototype device, derivation of exciting current conditions for generating the ac ampere force using finite element analysis and demonstration of steady levitation force and pull-up operation.
Keywords: Magnetic levitation, ac ampere force, pull-up operation, aluminum ring, finite element analysis
