반도체디스플레이기술학회지 (Journal of the Semiconductor & Display Technology)

한국반도체디스플레이기술학회 (The Korean Society Of Semiconductor & Display Technology)
권호 표지

내부 손실 저항이 있는 정상상태 모델을 이용한 LLC 공진형 하프 브리지 dc-dc컨버터의 최적 설계에 관한 연구

A Study on the Optimal Design of LLC Resonant Half-bridge dc-dc Converter Using a Steady-state Model with Internal Loss Resistors

  • 유정상 (청주대학교 전자공학과) ;
  • 안태영 (청주대학교 전자공학과)
  • Yoo, Jeong Sang (Department of Electronic Engineering, Cheongju University) ;
  • Ahn, Tae Young (Department of Electronic Engineering, Cheongju University)
  • 투고 : 2022.09.07
  • 심사 : 2022.09.17
  • 발행 : 2022.09.30
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초록

In this paper, the optimal design and circuit simulation verification results of an LLC resonant half-bridge dc-dc converter using a steady-state model with internal loss resistance are reported. Above all, the input/output voltage gain and frequency characteristic equations in the steady-state were derived by reflecting the internal loss resistance in the equivalent circuit. Based on the results, an LLC resonant half-bridge dc-dc converter with an input voltage of 360-420V, an output voltage of 54V, and a maximum power of 3kW was designed, and to verify the design, the PSIM circuit simulation was executed to compare and analyze the result. In particular, the operating range of the converter could be drawn from the frequency characteristic graph of the voltage gain, and when the converter was operated under light and maximum load conditions, it was confirmed that similar results were obtained by comparing simulation results and calculation results in the switching frequency characteristic graph. In addition, the change of the switching frequency with respect to the load current at each input voltage was compared with the calculated value and the simulation result. As a result, it was possible to confirm the usefulness of the analysis result reflecting the internal loss resistance proposed in this paper and the process of the optimal design.

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과제정보

이 연구는 2022년도 산업통상자원부 및 산업기술평가관리원 (KEIT) 연구비 지원에 의한 연구임(20018577).

참고문헌

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