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

  • 제26권1호
  • /
  • Pages.46-52
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  • 2021
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  • 1229-2214(pISSN)
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  • 2288-6281(eISSN)
전력전자학회 (The Korean Institute of Power Electronics)
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LLC 공진 컨버터의 120Hz 출력전압 리플 저감을 위한 전향보상 방법

A Feedforward Compensation Method for 120Hz Output Voltage Ripple Reduction of LLC Resonant Converter

  • Yoon, Jong-Tae (Dept. of Electrical Eng., Korea Nat'l Univ. of Transportation) ;
  • Lee, Kui-Jun (Dept. of Electrical Eng., Korea Nat'l Univ. of Transportation)
  • 투고 : 2020.11.02
  • 심사 : 2020.12.08
  • 발행 : 2021.02.20
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초록

This study proposes a feedforward compensation control method to reduce 120 Hz output voltage ripple in a single-phase AC/DC rectifier system composed of PFC and LLC resonant converters. The proposed method compensates for the voltage ripple of the DC-link by using the AC input and DC output power difference, and then reduces the final output voltage ripple component of 120 Hz through feedforward compensation based on the linearized frequency gain curve of the LLC resonant converter. Through simulation and experimental results, the validity of the ripple reduction performance was verified by comparing the conventional PI controller and the proposed feedforward compensation method.

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참고문헌

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