논문 해외 국제전문학술지(SCI급) Analysis and Design of LLC Converter Considering Output Voltage Regulation Under No-Load Condition
- 학술지 구분 국제전문학술지(SCI급)
- 게재년월 2020-01
- 저자명 이병희,Kim, JW (Kim, Jong-Woo),Park, MH (Park, Moo-Hyun),Lai, JS (Lai, Jih-Sheng)
- 학술지명 IEEE TRANSACTIONS ON POWER ELECTRONICS
- 발행처명 IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- 발행국가 해외
- 논문언어 외국어
- 전체저자수 4
홈페이지논문 초록 (Abstract)
In the no-load condition, LLC converter usually fails to regulate its output voltage although it operates at a high switching frequency. Till now, it is hard to obtain the exact relationship between design parameters and the maximum switching frequency for no-load regulation capability. In this paper, a specific criterion for no-load regulation of LLC converter is provided, without using active components or other modulation schemes. By analyzing the macroscopic switching period and microscopic switching transition in the no-load condition, it is shown that not only the peaking resonant current during the switching transition, but also the resonant tank design affect the no-load regulation of the LLC converter, which affects the no-load regulation capability. Furthermore, the relationship among design parameters is analyzed and the design guideline is also provided to achieve no-load regulation at the specified maximum switching frequency. To verify the effectiveness of the proposed design, 400 V input and 50 V/200W output prototype is built and tested.