Method for High Frequency Modeling of Transformers Using the
                            S-Parameter

Jung, Hyeonjong; Yoon, Seok Soo; Kim, Yuseon; Bae, Seok; Lim, Yeongseog

doi:10.5515/kjkiees.2018.29.9.677

Cited by 1 publication

(1 citation statement)

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“…EMI 필터에는 수 동필터(passive filter)와 능동필터(active filter)가 있으며, 각각의 필터들은 공통모드(common mode)와 차동모드 (differential mode) 노이즈를 저감시켜 준다 [1], [2] . 이러한 노 이즈는 스위칭에 의한 기생진동이나 고주파 변압기의 기 생커패시턴스에 의해 발생하며, 대체로 이론적 필터설계 와 다른 양상의 결과를 주기 때문에 실제 필터 설계 후에 도 다양한 대안이 필요하다 [3]～ [5] .…”

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EMI Noise Reduction of AC/DC Converter Using the Secondary Low Pass Filter

Lee¹,

Park²

2019

J. Korean Inst. Electromagn. Eng. Sci.

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In this paper, we measure the Electromagnetic Interference(EMI) noise of AC/DC converters in lighting devices to enable us to optimize the design of its filters as compared to the conventional filters. Addition of RC filters to the circuit helps in increasing the noise margin, thereby, reducing the noise generated by high-frequency transformers and switching devices. The characteristics of each converter are compared after addition of RC filter to the circuit. To reduce the noise generated by the high frequency band, ranging from 1 MHz to 30 MHz, high frequency transients and switching devices, with a cut off frequency closer to the band, have been designed. The results are measured using an oscilloscope. A reduction in noise is observed in case of a filter designed using a combination of R and C with a cutoff frequency of 1 MHz. The EMI Receiver shows that the noise is significantly reduced on addition of filters and the noise reduction ranges from 2 dBuV to 11 dBuV, respectively.

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EMI Noise Reduction of AC/DC Converter Using the Secondary Low Pass Filter

Lee¹,

Park²

2019

J. Korean Inst. Electromagn. Eng. Sci.

View full text Add to dashboard Cite

show abstract

Method for High Frequency Modeling of Transformers Using the S-Parameter

Cited by 1 publication

References 12 publications

EMI Noise Reduction of AC/DC Converter Using the Secondary Low Pass Filter

EMI Noise Reduction of AC/DC Converter Using the Secondary Low Pass Filter

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