電源トランス及びその設計の現状

概要

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With the downsizing of switching power supplies in recent years, efforts have been exerted to develop smaller, more efficient power supply transformers with higher value added. In addition, the need to develop power-saving transformers has increased since the COP3 Framework Treaty on Climate Change Meeting held in Kyoto, Japan, in 1997. As a result, demand is growing for soft ferrite materials having higher flux density and lower loss. The current data on ferrite materials, however, do not reflect the operation conditions of switching power supplies. It is thus necessary to develop a new ferrite core evaluation method that enable prediction of power savings in power supply transformers in relation to ferrite material formulation, core shape, and winding mode. We report our current activities in material development and circuit design, with a view to establishing a new ferrite core evaluation method and to obtaining power-saving transformers with higher efficiency.
社団法人日本磁気学会の論文
2000-04-15