• 제목/요약/키워드: Interleaved LLC converter

검색결과 13건 처리시간 0.027초

Two Phase Interleaved LLC 공진 컨버터 (Two Phase Interleaved LLC Resonant Converter)

  • 김주훈;이광호;김은수;이재삼;이현관;정용채
    • 전력전자학회논문지
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    • 제14권5호
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    • pp.397-405
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    • 2009
  • 최근 대화면 및 슬림화를 위한 LCD TV의 전원장치는 고집적화와 고효율에 대한 연구가 이슈가 되고 있고, 이를 위해 Multi-phase LLC 공진컨버터가 연구되고 있으며 본 논문에서는 제어회로를 간단화 하면서 300W Two Phase Interleaved LLC 공진컨버터를 제안 적용한 실험결과에 대하여 서술하였다.

Current Sharing Method Based on Optimal Phase Shift Control for Interleaved Three-Phase Half Bridge LLC Converter with Floating Y-Connection

  • Shi, Lin;Liu, Bangyin;Duan, Shanxu
    • Journal of Power Electronics
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    • 제19권4호
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    • pp.934-943
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    • 2019
  • A current balance problem exists in multi-phase LLC converters due to the resonant parameter tolerance. This paper presents a current balancing method for interleaved three-phase half bridge LLC converters. This method regulates the phase shift angle of the driving signals between the three phases based on a converter with a floating Y-connection. The floating midpoint voltage has different influences on each phase current and makes the three-phase current balance performance better than midpoint non-floating systems. Phase shift control between modules can further regulate the midpoint voltage. Then three phase current sharing is realized without adding extra components. The current distributions in a midpoint non-floating system and a midpoint floating system are compared. Then the principle and implementation of the proposed control strategy are analyzed in detail. A 3kW prototype is built to verify the validity and feasibility of the proposed method.

A Novel Two Phase Interleaved LLC Series Resonant Converter using a Phase of the Resonant Capacitor

  • Yi, Kang-Hyun;Moon, Gun-Woo
    • Journal of Power Electronics
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    • 제8권3호
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    • pp.275-279
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    • 2008
  • An LLC series resonant converter has many unique characteristics and improvements over PWM topologies. However, many output capacitors are needed in parallel to satisfy output voltage ripple and the rated ripple current of the capacitors. This paper deals with a novel two phase interleaved LLC resonant converter using a phase of the resonant capacitor. The proposed converter can satisfy output voltage ripple and a rated ripple current of capacitors with few output capacitors, relatively. The operation and features are considered in detail and a prototype with a 12V-100A output is investigated.

Novel two phase interleaved LLC series resonant converter using a phase of the resonant capacitor

  • Yi, Kang-Hyun;Moon, Gun-Woo;Heo, Tae-Won
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 2008년도 하계학술대회 논문집
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    • pp.526-528
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    • 2008
  • LLC series resonant converter has many unique characteristics and improvement over PWM topologies. However, many output capacitors should be needed in parallel to satisfy an output voltage ripple and a rated ripple current of the capacitors. This paper is deal with a novel two phase interleaved LLC resonant converter using a phase of the resonant capacitor. The proposed converter can satisfy output voltage ripple and a rated ripple current of capacitors with few output capacitors, relatively. The operation and features is considered in detail and a prototype with a 12V-100A output is investigated.

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Novel Interleaved Single-Stage AC/DC Converter with a High Power Factor and High Efficiency

  • Wang, Yijie;Wang, Wei;Zhang, Xiangjun;Xu, Dianguo
    • Journal of Power Electronics
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    • 제11권3호
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    • pp.245-255
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    • 2011
  • A novel single-stage AC/DC converter with the soft-switching characteristic based on interleaving technology and an LLC topology is proposed here. The converter is integrated by an interleaved cell and an LLC cell. Because the components of the system are reduced as a result of integrating, the cost decreases. Since interleaving technology is adopted, the converter can work in a high voltage input state. The LLC topology chosen here ensures that the switches on the primary side work in the ZVS condition and that the diodes on the secondary side work in the ZCS condition, which decreases the switching loss of the system. A theoretical analysis and the design procedures of the proposed converter are proposed and discussed in detail. Simulations and experimental studies with a 100W prototype are done to prove the analysis.

태양광 발전용 2단 구성 DC/DC 컨버터 (Two Stage DC/DC Converter for Photovoltaic Generation)

  • 윤광호;품소피악;김은수;원종섭;오성진
    • 전력전자학회논문지
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    • 제16권6호
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    • pp.618-626
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    • 2011
  • 태양전지는 미래에너지를 위한 중요한 신재생에너지원이다. 본 논문에서는 태양광 발전 (PV PCS)를 위한 2단구성 DC/DC컨버터와 동작제어를 제안한다. 넓은 입력전압 제어범위를 갖는 제안된 DC/DC컨버터는 1차 병렬 2차 직렬로 연결된 Two Tank LLC공진컨버터와 Interleaved 승압 컨버터로 구성되어있고, 태양광모듈 전압범위에 따라 하나의 시스템 또는 두 개의 시스템으로 동작시켜 전체 평균효율을 증가시키는 방법을 제안한다. 제안된 컨버터에 대한 동작특성에 대해 분석, 서술되어 있으며, 2.2kW급 시제품 제작 및 실험을 통하여 적용 가능함을 보였다.

전기자동차 OBC용 LLC 공진형 컨버터의 설계절차 (Design Procedures of LLC Resonant Converter for Electric Vehicle On-Board Charger)

  • 정용채
    • 한국전자통신학회논문지
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    • 제9권1호
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    • pp.91-96
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    • 2014
  • 최근 양산되고 있는 하이브리드 전기자동차에 비해서 연비를 좀 더 개선하기 위한 플러그인 하이브리드 전기자동차(Plug-in Hybrid Electric Vehicle)에 대한 연구가 활발히 진행되고 있다. 이 논문에서는 플러그인 하이브리드 전기자동차를 위한 고효율의 탑재형 충전기(on-board charger)에 대해서 연구한다. 탑재형 충전기는 2상 인터리브드 PFC 회로와 LLC 공진형 컨버터로 구성된다. LLC 공진형 컨버터의 새로운 설계절차를 본 논문에서 제안한다. 이는 매우 쉽고 강력한 방법이다. 위에서 언급한 내용을 확인하기 위해서 LLC 공진형 컨버터를 설계하고 PSIM 툴을 이용하여 테스트한다.

Two Phase LLC 공진 컨버터 (Two Phase Interleaved LLC Resonant Converter)

  • 김주훈;강성인;정봉근;김은수;허동영;정용채
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 2008년도 추계학술대회 논문집
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    • pp.115-117
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    • 2008
  • 최근 가전기기의 고집적화와 고효율을 위한 연구가 이슈화 되고 있다. 이러한 고효율과 고집적화의 효과를 얻기 위한 방법으로 Multiphase LLC 공진 컨버터가 연구되고 있으며 본 논문에서는 제어회로를 간단화 하면서 Two Phase Interleaved LLC 공진 컨버터를 제안하였고 총 250W급 변압기를 적용하여 실험한 결과에 대하여 서술 하였다.

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위상 천이 제어를 이용한 Interleaved LLC 공진형 컨버터의 전류 균등 분배 방법 (Current Sharing for Interleaved LLC Resonant Converter with Phase-Shift Control)

  • 백종복;채수용
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 2016년도 전력전자학술대회 논문집
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    • pp.48-49
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    • 2016
  • Interleaved 컨버터의 경우 전류 리플을 줄여 출력 필터의 사이즈를 줄이기 위해 많이 사용된다. 하지만 모듈간 소자값의 편차가 발생할 경우 전류 불평형을 초래하게 되며, 이는 리플저감효과를 감소시키거나 방열문제, 노화촉진, 그리고 오동작을 일으킬 가능성을 높이게 한다. 특히 공진형 컨버터의 경우 주파수 제어를 시도하기 때문에 Interleaving 기법을 적용하여 효용성을 얻기에는 제약이 많다. 본 논문에서는 이러한 소자값의 불일치로 인한 전류 불평형 문제를 해결하기 위해 위상천이변조 제어를 제안한다. 동작원리와 시스템에 대한 분석을 제시하고, 모의실험을 통해 타당성을 검증한다.

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Interleaved ZVS Resonant Converter with a Parallel-Series Connection

  • Lin, Bor-Ren;Shen, Sin-Jhih
    • Journal of Power Electronics
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    • 제12권4호
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    • pp.528-537
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    • 2012
  • This paper presents an interleaved resonant converter with a parallel-series transformer connection in order to achieve ripple current reduction at the output capacitor, zero voltage turn-on for the active switches, zero current turn-off for the rectifier diodes, less voltage stress on the rectifier diodes, and less current stress on the transformer primary windings. The primary windings of the two transformers are connected in parallel in order to share the input current and to reduce the root-mean-square (rms) current on the primary windings. The secondary windings of the two transformers are connected in series in order to ensure that the transformer primary currents are balanced. A full-wave diode rectifier is used at the output side to clamp the voltage stress of the rectifier diode at the output voltage. Two circuit modules are operated with the interleaved PWM scheme so that the input and output ripple currents are reduced. Based on the resonant behavior, all of the active switches are turned on under zero voltage switching (ZVS), and the rectifier diodes are turned off under zero current switching (ZCS) if the operating switching frequency is less than the series resonant frequency. Finally, experiments with a 1kW prototype are described to verify the effectiveness of the proposed converter.