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AC/DC Adaptor Utilizing a Transformer with a New Plastic Magnetic Core  

An, Tae-Yeong (청주대학교 정보통신공학부.)
Publication Information
The Transactions of the Korean Institute of Electrical Engineers B / v.51, no.7, 2002 , pp. 406-412 More about this Journal
Abstract
This paper presents a novel transformer with a new plastic magnetic core for switching power supplies. The proposed plastic magnetic core was realized using a simple manufacturing process and it can be easily designed with various shapes, suggesting that the manufacturing cost of a power transformer can be reduced using the proposed plastic magnetic core. The possible application potentials of the proposed transformer a AC/DC adaptor utilizing a transformer with the plastic magnetic core are explored. The developed adaptor, that has a maximum power of 24W, switching frequency of 125kHz, and input voltage of 110/220V, has been successfully implemented. A maximum power conversion efficiency of the experimental converter was measured at 77%, and the output was regulated at 12V within 0.2% tolerance.
Keywords
Plastic magnetic core; Adaptor; Flyback; DC/DC converter;
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