300 W급 평면 변압기의 설계 및 분석 = Design and Analysis of the 300 W Planar Transformer

다국어 초록 (Multilingual Abstract)

The forward planar transformer, which had power capacity of 300 W, input voltage of 220 V, output voltage of 15 V, and switching frequency of 300 KHz, was designed and manufactured by using the planar core with large effective area and the flat copper leadframes for miniaturization and high efficiency of the switching mode power supply (SMPS). As well as, a forward converter equipped with the above mentioned planar transformer was manufactured and electromagnetic characteristics were investigated. The numerical value of turns for 1st and 2nd winding were 15 and 2 respectively The self inductance of 1st winding was 1.592 mH, very low leakage inductance of 2.7 $\mu$H, and the coupling factor of 0.928 were obtained at switching frequency of 300 KHz. The high efficiency of 88.62 % for the SMPS equipped with planar transformer was obtained at power capacity of 300 W.

참고문헌 (Reference)

1 "평면코어용 Mn-Zn 페라이트의 물성" 96-, 2003.

2 "평면 변압기의 설계와 전자기적 특성" 12 (12): 109-, 2002.

3 "초소형 고효율 평면변압기의 기술동향" 6 (6): 22-, 2001.

4 "공정에 따른 Mn-Zn 페라이트의 자성손실 거동" 541-, 2003.

5 "Magnetic core selection for transformers and inductors" 7-, 1997.

6 "Design of Planar Power Trans- fo" 2000.

7 "300 W급 평면 변압기의 설계 및 분석" 46-, 2003.

8 ""저전력, 고주파, 고효율 자성박막 변압기 설계 및 제작에 대한 연구" 50c : 555-, 2001.