The Transactions of the Korean Institute of Power Electronics (전력전자학회논문지)

The Korean Institute of Power Electronics (전력전자학회)
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A Study on Characteristics Analysis of Common-Mode Choke with Reduced Parasitic Capacitance

기생 커패시턴스 저감형 공통모드초크의 특성해석에 관한 연구

  • Won, Jae-Sun (CDS Development Team, Samsung Electro-Mechanics) ;
  • Kim, Hee-Seung (CDS Development Team, Samsung Electro-Mechanics) ;
  • Kim, Jong-Hae (Dept. of Electronic and Electrical Eng., Catholic University of Daegu)
  • Received : 2014.09.29
  • Accepted : 2015.02.16
  • Published : 2015.04.20
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Abstract

This paper presents the intra capacitance modeling based on the winding method and section bobbin for CM choke capable of EMI attenuation of broad bands from lower to higher frequency bands and high frequency type common-mode choke capable of EMI attenuation of high frequency band used in the EMI Block of LED-TV SMPS. The case of high frequency type CM choke can be explained by the parasitic capacitance of three types of CM choke. The winding method of section bobbin type is smaller than the others. The first resonant frequency of the proposed CM choke tends to increase as the parasitic capacitance becomes small and its impedance characteristics improved performance as the first resonant frequency increases. The CM chokes of the proposed section bobbin type shows that in the future, the method may have practical use in LED/LCD-TV SMPS and in several applications, such as LED lighting, adapters, and so on.

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References

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