Reduction of eddy current loss in magnetoplated wire

• Tsutomu Mizuno ^[1] ; Shigemi Enoki ^[2] ; Takayuki Suzuki ^[1] ; Takashi Asahina ^[2]
  1. [1] Shinshu University

     Shinshu University

     Japón

     
  2. [2] Shinkawa Sensor Technology
• Localización: Compel: International journal for computation and mathematics in electrical and electronic engineering, ISSN 0332-1649, Vol. 28, Nº Extra 1 (Special Issue: Selected Papers from ISTET 2007), 2009, págs. 57-66
• Idioma: inglés
• Enlaces
  • Texto completo
• Resumen

  • Purpose – The purpose of this paper is to reduce eddy current loss in a wire that is affected by an alternating field passing through it. This allows the efficiency of transformers to be upgraded and the quality factor in coils to be increased.

    Design/methodology/approach – The use of a magnetoplated wire (MPW) is proposed to reduce eddy current loss in a wire. An MPW is a copper wire (COW) whose circumference is plated with a magnetic thin film. In additional, the theoretical equation for eddy current loss in an MPW is derived for ease of analysis.

    Findings – The eddy current loss in an MPW is calculated as a function of the relative permeability and resistivity of its magnetic thin film to reduce the resistance due to the proximity effect of a coil. The eddy current loss in an MPW whose magnetic thin film has a relative permeability of 500 and a resistivity of 0.12 μΩm can be reduced to 4 percent that of COW at a frequency of 1 MHz.

    Originality/value – The use of MPW can be expected to upgrade the efficiency of transformers and to increase the quality factor in coils.