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

The Korean Institute of Power Electronics (전력전자학회)
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A Study on the Affected of DC-Link Voltage Balance Control of the Vienna Rectifier Linked With the Input Series Output Parallel LLC Converter

직렬 입력 병렬 출력 연결된 LLC 컨버터를 갖는 비엔나 정류기의 DC 링크 전압 평형 제어에 관한 연구

  • Baek, Seung-Woo (Dept. of Control & Instrumentation Engineering, Korea Nat'l University of Transportation) ;
  • Kim, Hag-Wone (Electronic Engineering, Korea Nat'l University of Transportation) ;
  • Cho, Kwan-Yuhl (Dept. of Control & Instrumentation Engineering, Korea Nat'l University of Transportation)
  • Received : 2020.11.24
  • Accepted : 2021.03.03
  • Published : 2021.06.20
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Abstract

Due to the advantage of reducing the voltage applied to the switch semiconductor, the input series and output parallel combination is widely used in systems with high input voltage and large output current. On the other hand, the LLC converter is widely used as a high-efficiency power converter, and when connected by ISOP combination, there is a possibility that input voltage imbalance may occur due to a mismatch of passive devices. To avoid damaging the switching device, this study analyzed the DC-link voltage imbalance of a high-capacity supply using an ISOP LLC converter. In addition, the case where DC-link unbalance control was applied and the case not applied was analyzed respectively. Based on this analysis, an initial start-up algorithm was proposed to prevent input power semiconductor device damage due to DC-link over-voltage. The effectiveness of the proposed algorithm has been verified through simulations and experiments.

Keywords

Acknowledgement

이 논문은 동아 일렉콤의 연구비 지원으로 연구되었습니다. 본 연구는 2020년도 산업통상자원부의 재원으로 한국에너지기술평가원(KETEP)의 에너지인력양성사업으로 지원받아 수행한 인력양성 성과입니다. (No. 20184030202270)

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