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LED-TV용(用) 전원장치에 적합한 기생 커패시턴스 저감형 Hybrid 초크 코일의 특성 해석에 관한 연구

A Study on the Characteristics Analysis of Hybrid Choke Coil with Reduced Parasitic Capacitance suitable for LED-TV SMPS

  • Lee, Jong-Hyeon (School of Electronic and Electrical Engineering, Daegu Catholic University) ;
  • Kim, Gu-Yong (School of Electronic and Electrical Engineering, Daegu Catholic University) ;
  • Kim, Jong-Hae (School of Electronic and Electrical Engineering, Daegu Catholic University)
  • 투고 : 2018.03.12
  • 심사 : 2018.03.28
  • 발행 : 2018.03.31

초록

본 논문은 LED-TV용 SMPS EMI 감쇄 필터에서 적용되고 있는 저주파와 고주파의 광범위한 대역에서 EMI 감쇄가 가능한 기생 커패시턴스 저감형 Hybrid 초크 코일의 코일 구조, 권선 방법 및 섹션 보빈에 따른 기생 커패시턴스 임피던스 모델링을 나타내고 있다. 특히 본 논문에서 제안한 기생 커패시턴스 저감형 Hybrid 초크 코일은 평각 동선 권선방법을 채택함으로써 기존의 자동 권선형 공통 모드 초크 코일에 비해 기생커패시턴스($C_p$)을 저감할 수 있다. 기생 커패시턴스($C_p$)가 작아짐에 따라 제안한 기생 커패시턴스 저감형 Hybrid 초크 코일의 1차 공진 주파수는 증가하며 1차 공진 주파수가 증가함에 따라 특히 고주파 대역에서 임피던스특성이 개선됨을 알 수 있다. 본 논문에서 제안한 기생 커패시턴스 저감형 Hybrid 초크 코일은 향후 LED-TV SMPS를 포함한 LED 조명, Note-PC Adapter 등과 같은 다양한 분야에 응용되리라 사료된다.

This paper describes the parasitic capacitance modeling according to the coil structure, section bobbin and winding method for hybrid choke coil with reduced parasitic capacitance capable of the EMI attenuation of broad bands from lower frequency to higher frequency applied in the EMI attenuation filter of LED-TV SMPS. Especially, the hybrid choke coil with reduced parasitic capacitance($C_p$) proposed in this paper can reduces the parasitic capacitance($C_p$) by adopting the winding methods of rectangular copper wire, compared to the conventional common mode choke coil with the winding method of automatic type. The first resonant frequency of the proposed hybrid choke coil has a tendency to increase as the parasitic capacitance is smaller and its impedance characteristics, especially in the high frequency bands, improves as the first resonant frequency increases. In the future, the proposed hybrid choke coil with reduced parasitic capacitance shows it can be actually utilized in not only LED-TV SMPS but also various applications such as LED Lighting, Note-PC Adapter, and so forth.

키워드

참고문헌

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