Journal of Power Electronics

  • 제22권5호
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  • Pages.870-882
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  • 2022
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  • 1598-2092(pISSN)
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  • 2093-4718(eISSN)
전력전자학회 (The Korean Institute of Power Electronics)
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DOI QR코드

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Predictive charge control for LLC resonant converters

  • Chen, Siqiang (School of Electric Power, South China University of Technology) ;
  • Du, Guiping (School of Electric Power, South China University of Technology) ;
  • Lei, Yanxiong (School of Electric Power, South China University of Technology) ;
  • Li, Tuhuan (School of Electric Power, South China University of Technology)
  • 투고 : 2021.10.01
  • 심사 : 2022.01.21
  • 발행 : 2022.05.20
⟨ 이전 논문 다음 논문 ⟩

초록

A predictive charge control method based on an LLC resonant converter is proposed in this paper. The input charge in each cycle is reflected in the change of the resonant capacitor voltage. The threshold is set to compare it with the resonant capacitor voltage to control the input charge. Based on an LLC discrete predictive model, the predictive charge control predicts the threshold of the resonant capacitor voltage to regulate the output voltage. When compared with existing control methods, the predictive charge control has the advantages of an intuitive concept, a strong robustness, a simple implementation, and a simple model. It has excellent dynamic performance under various working conditions. The resonant tank can enter the steady state within one cycle without affecting the steady-state performance of the system. Through a mode analysis, this paper analyzes the proposed predictive charge control in detail. A 500 W LLC resonant converter prototype is built to verify the proposed method. Results show that both the output voltage and the resonant tank return to the steady state without fluctuations in one cycle during the processes of input voltage change and load switching.

키워드

과제정보

This work was supported by the Guangdong Provincial Natural Science Research Team Project: New Energy Efficient Electrical Energy Conversion, 2017B030312001.

참고문헌

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