• 제목/요약/키워드: LC Resonant

검색결과 143건 처리시간 0.036초

노치 필터 적용 양방향 LLC-LC 공진컨버터 (Bidirectional LLC-LC Resonant Converter With Notch Filter)

  • 장기찬;김은수
    • 전력전자학회논문지
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    • 제26권6호
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    • pp.411-420
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    • 2021
  • In this paper, bidirectional LLC-LC resonant DC-DC converter with notch filters in the primary side of resonant circuits is proposed. Even if resonant capacitors are used on the primary and secondary sides, the proposed converter can operate with the high gain characteristics of the LLC resonant converter without mutual coupling of resonant capacitors, regardless of the direction of power flow. In addition, by applying notch filters, the proposed converter can operate with a wider gain control range and can cope with overload and short circuit. The analysis and operating characteristics of the proposed bidirectional LLC-LC resonant converter are investigated. A 3.3 kW prototyped bidirectional LLC-LC resonant converter connected to 750 VDC buses is designed and tested to verify the validity and applicability of this proposed converter.

상용주파의 LC공진회로를 이용한 입력전류파형 개선 (Input Current Waveform Improvenment using LC Resonant Circuit in Commercial Frequency)

  • 문상필;김칠용;권순걸;서기영
    • 조명전기설비학회논문지
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    • 제21권5호
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    • pp.126-132
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    • 2007
  • 본 논문에서는 일반적으로 사용되어지는 배전압 단상 정류회로에 LC 공진회로를 첨가하여, 고조파의 성분을 저감시키는 고역률 단상 정류회로를 제안하였다. 제안한 회로는 다이오드 브리지에 병렬로 커패시터를 접속하고, 입력에 인덕터L을 추가하여 접속시키므로써 상용주파수에서 LC 공진현상을 이용하여, 수동소자만으로 입력전류를 정현파화한다. 그리고 고조파 제어 규제값의 여유도 만족시킨다. 이 모든 사항에 대해 실험과 시뮬레이션 결과를 비교, 분석을 통하여 그 타당성을 확인하였다.

트랜스포머 자가 LC공진을 이용한 고전압 유전가열 연구 (Dielectric Heating using High Voltage Generation of Self LC Resonance of Transformer)

  • 정재훈;김희제;김수원
    • 전기학회논문지
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    • 제61권12호
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    • pp.1877-1879
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    • 2012
  • Generally, stray capacitance is unnecessary element of designing circuit, because it can not be predicted by a designer. But we propose LC Resonant Circuit using stray capacitance of transformer. This method proposes miniaturization of circuit, because LC Resonant Circuit can be make simply to using stray capacitance instead of capacitor and size of transformer is reduced. Finally, we research aspect of dielectric heating by change of frequency and output voltage using developed converter.

LC 직렬 공진을 이용한 양방향 DC/DC 컨버터 (A LC series resonant bidirectional DC/DC converter)

  • 박건욱;정두용;송인범;이수원;정용채;원충연
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 2010년도 추계학술대회
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    • pp.198-199
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    • 2010
  • In this paper, bi-directional DC/DC converter using a LC series resonant converter is proposed. A proposed converter is consisted by adding LC series resonant tank into a conventional bi-directional DC/DC converter and performs soft-switching at both boost and buck mode. A LC series resonance occurs in whole operation mode and switching point is determined by specific condition. Through the theoretical analysis and simulation results, operation modes and characteristics of the proposed topology is verified.

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단일 스위치를 사용한 LC직렬 공진형 부스트 컨버터 (A LC Series Resonant Boost Converter Using a Single Switch)

  • 박건욱;정두용;지용혁;정용채;한희민;원충연
    • 전력전자학회논문지
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    • 제15권6호
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    • pp.432-440
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    • 2010
  • 본 논문에서는 단일 스위치를 사용한 LC 직렬 공진형 부스트 컨버터를 제안하였다. 제안하는 토폴로지는 별도의 보조 스위치의 추가 없이 일반 부스트 컨버터에 수동소자만을 추가하여 스위치 턴-온, 턴-오프 시 영전압 스위칭(ZVS; Zero Voltage Switching)을 수행한다. 이 토폴로지는 LC직렬 공진에 의해 스위치 오프 타임이 결정되므로, 스위치 온 타임을 가변하여 출력전압을 조절하는 온 타임 가변형 주파수 변조 기법으로 제어된다. 전류 도통 경로에 따라 제안된 회로의 동작 모드를 구분하였고, 제안된 컨버터의 동작모드와 특성은 수학적 해석과 시뮬레이션 및 실험을 통해서 검증하였다.

PWM인버터의 출력 LC필터에 의한 공진전압 억제 기법 (Method for Damping Resonant Voltages on the Output LC Filter of PWM Inveter)

  • 최경진;전태원;이흥희;노의철;김흥근
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 2004년도 전력전자학술대회 논문집(1)
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    • pp.415-419
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    • 2004
  • The U filter has been generally used to filter the output voltage of PWM inverter to the sinusoidal waveform. The resonant voltage on the output voltage of PWM inverter may be generated due to LC filter. This paper proposed the algorithm to damp the resonant voltage using the virtual resistor without decreasing the efficiency by the power loss in the real resistor The method is appled to the vector controlled induction motor driven by the PWM inverter with the LC filter. The simulation results are carried out to verify the performances of the proposed algorithm.

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LC공진 회로와 PPF제어기를 이용한 자체 측정식 자기 서스펜션 시스템 (Self-Sensing Magnetic Suspension System using an LC Resonant Circuit with a Positive Position Feedback Controller)

  • 최창환;박기환
    • 제어로봇시스템학회논문지
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    • 제5권7호
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    • pp.787-793
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    • 1999
  • A self-sensing magnetic suspension system utilizing a LC resonant circuit is proposed by using the characteristic that the inductance of the magnetic system is varied with respect to the air gap displacement. An external capacitor is added into the electric system to make the levitation system be statically stable system, which much relieves the control effort required to stabilize the magnetic suspension system of haying an intrinsic unstable nature. For the realization of the self- sensing magnetically levitated system, an amplitude modulation / demodulation method is used with a positive position feedback controller Experimental results are presented to validate the proposed method.

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LC 공진 회로를 이용한 유도전동기 구동용 사이크로콘버터에 관한 연구 (A Study on the Cycloconverter with a LC resonant Circuit for a Induction Moter Drive)

  • 김영석;조규민
    • 한국조명전기설비학회:학술대회논문집
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    • 한국조명전기설비학회 1990년도 추계학술발표회논문집
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    • pp.47-52
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    • 1990
  • This paper presents a cyclocoverter with a LC resonant circuit for a induction motor dr-ive. The cycloconverter can provide variab-le voltage and frequency three phase output while keeping the input displacement factor at 1.0. The input current wave forms are sinusoidal, and the wide output frequency ran-ge is appropriate for variable speed AC motor drives.

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LC 공진 회로를 이용한 사이크로콘버터에 관한 연구 (A Study on the Cycloconverter with a LC Resonant Circuit)

  • 김영석;조규민;박성진
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1990년도 하계학술대회 논문집
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    • pp.376-379
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    • 1990
  • This parer presents a cycloconverter with a LC resonant circuit for a induction motor drive. The cycloconverter can provide variable voltage and frequency three phase output while keeping the input displacement factor at 1.0. The input current wave for is are sinusoidal,and the wide output frequency range is appropriate for variable speed AC motor drives.

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LC 직렬형 및 LLCC 병렬형 고주파 공진형 컨버터의 회로 특성 (The characteristic of circuit of LC-type series and LLCC-Type parallel High frequency parallel resonant converter)

  • 차인수;박혜암
    • 한국조명전기설비학회:학술대회논문집
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    • 한국조명전기설비학회 1993년도 추계학술발표회논문집
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    • pp.71-75
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    • 1993
  • The Modeling analysis and design of a high frequency LC-type series and LLCC-type parallel resonant converter oprating in the continous conduction is presented. The state-plane diagram representation of the converter response gives and good insight into the converter operation. A set of characterisric frequency are plotted which design parameters can be obtained.

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