抄録
This paper describes the electrical characteristics of the multilayered transformer which is composed of Mn-Zn ferrite core, primary and secondary conductors positioned alternately not only in the vertical direction but also in the horizontal direction. In order to clarify the operation characteristics of the two types of transformers, one had the conventional planar winding structure and the other had the new winding structure mentioned above, two dimensional finite element method which took account of two conditions, constant input voltage and load current, was introduced. The coupling coefficient of the conventional multilayered transformer degraded with increasing load current. On the other hand, the proposed multilayered transformer had independent coupling coefficient on the load current. The forward type DC-DC converter using the new multilayered transformer had higher efficiency than the converter using the conventional multilayered transformer.
