• 제목/요약/키워드: Partial resonant method

검색결과 51건 처리시간 0.045초

부분공진기법에 의한 고효율 인버터 시스템 (High Efficiency Inverter System by Partial Resonant Method)

  • 김영철;이현우
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 1998년도 연구회 합동 학술발표회 논문집
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    • pp.39-43
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    • 1998
  • A large number of soft switching topologies included a resonant circuit have been proposed. But these circuits increase number of switch in circuit and complicate sequence of switching operation. In this paper, the authors propose power conversion system, DC-AC inverter of high efficiency and high power factor with soft switching mode by partial resonant method. The switching devices in a proposed circuits are operated with soft switching by the partial resonant method, that is, PRS2MPC (Partial Resonant Soft Switching Mode Power Converter). The result is that the switching loss is very low and the efficiency of system is high. And the snubber condenser used in partial resonant circuit makes charging energy regenerated at input power source for resonant operation.

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인버터의 손실저감을 위한 소프트 스위칭기법 (A Soft switching method for Loss reduction of Inverter)

  • 곽동걸;김영철;이현우
    • 대한전자공학회:학술대회논문집
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    • 대한전자공학회 2001년도 하계종합학술대회 논문집(5)
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    • pp.249-252
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    • 2001
  • A large number of soft switching topologies included a resonant circuit have been proposed. But these circuits increase number of switch in circuit and complicate sequence of switching operation. In this Paper, the authors propose power conversion system, DC-AC inverter of high efficiency and high power factor with soft switching mode by partial resonant method. The result is that the switching loss is very low and the efficiency of system is high. And the snubber condenser used in partial resonant circuit makes charging energy regenerated at input power source for resonant operation.

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새로운 무손실 스너버를 이용한 부분공진형 고효율 $3\phi$ AC-DC 부스터 컨버터 (A New Partial Resonant Switching $3\phi$ Boost Converter with High Efficiency Using Lossless Snubber)

  • 전종함;서기영;이현우
    • 전자공학회논문지S
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    • 제34S권9호
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    • pp.118-125
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    • 1997
  • This paper proposed a new partial resonant 3.PHI. AC-DC boost converter of high efficiency using lossless snubber. The proposed converter, DCM (Discontinuous Current Mode) has a merit of simple controlled circuit because the input current control discontinuously. But turned off switching loss and stress of the switching device increase when the switch turned off at the peak of current. Therefore, the paper improves efficiency by adopting the PRS$^{2}$(Partial Resonant Soft Switching) in 3.PHI. AC-DC boost converter and makes the unity power factor. The PRS$^{2}$ is reduced a current/voltage stresses of switching devices. Also, a DCMPRS$^{2}$M(Discontinuous Conduction Mode Partial Resonant Soft Switching Method) appear the current and voltage equation of this circuit. The paepr examine in a 3.PHI. AC-DC boost converter and show the result of that.

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단일 펄스 소프트 스위칭을 이용한 고역률 고효율 DC-DC 컨버터 (High Power Factor and High Efficiency DC-DC Converter using Single-Pulse Soft-Switching)

  • 정상화;권순걸;서기영;이현우;곽동걸;김영철
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2003년도 하계학술대회 논문집 B
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    • pp.1148-1150
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    • 2003
  • Power conversion system must be increased switching frequency in order to achieve a small size, a light weight and a low noise. However, the switches of converter are subjected to high switching power losses and switching stresses. As a result of those, the power system brings on a low efficiency. To improved these, a large number of soft switching topologies included a resonant circuit has been prosed. But these circuits increase number of switch in circuit and complicate sequence of switching operation. In this paper, the authors propose a high power factor and high efficiency DC-DC converter using single-pulse soft switching by partial resonant switching node. The switching devices in a prosed circuit are operated with soft switching by the partial resonant method, that is, Partial Resonant Switch Mode Power Converter. The partial resonant circuit makes use of a inductor using step up and a condenser of loss-less snubber. The result is that the switching loss is very low and the efficiency of system is high. Also the proposed converter is deemed the most suitable for high power applications where the power switching devices are used. Some simulative results on computer results are included to confirm the validity of the analytical results.

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부분공진기법을 이용한 연계형 태양광발전시스템 (The Utility Interaction type PV system by using partial resonant system)

  • 고강훈;이현우;김영철;최광주
    • 한국조명전기설비학회:학술대회논문집
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    • 한국조명전기설비학회 1999년도 학술대회논문집-국제 전기방전 및 플라즈마 심포지엄 Proceedings of 1999 KIIEE Annual Conference-International Symposium of Electrical Discharge and Plasma
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    • pp.290-295
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    • 1999
  • This paper describes Trans-less type utility interactive system that is combined with buck/boost chopper applying partial resonant method, which remove Trans, and high efficient PWM inverter. Therefore, it is possible to make it lightweight, to cut down the cost, and to improve its reliability. What the merits of this system are that we con transmit arbitrary power to load and utility regardless of generating voltage magnitude and we can always obtain high factor controlling by equal phase signal with utility.

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부분공진 기법이 적용된 ZVCS DC-DC 초퍼에 관한 연구 (A Study on ZVCS DC-DC Chopper by using Partial Resonant Method)

  • 곽동걸
    • 마이크로전자및패키징학회지
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    • 제15권1호
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    • pp.59-64
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    • 2008
  • 최근 DC-DC 초퍼의 소형경량화 및 저소음화를 위해서 초퍼에 사용한 전력용 반도체 스위치의 스위칭 주파수를 증대시키고 있다. 이에 따른 스위칭 손실의 증대는 초퍼의 효율을 상당히 감소시키는 요인으로 주어진다. 이를 해결하기 위해 본 논문에서는 초퍼에 사용한 반도체 스위치의 턴-온, 턴-오프를 소프트 스위칭(영전류 또는 영전압 스위칭)으로 동작시켜 스위칭 손실을 최소화하는 새로운 고효율의 DC-DC 초퍼를 제안한다. 제안한 초퍼의 소프트 스위칭 동작은 스위치의 동작 시점에 부분공진 회로가 형성되어 인덕터의 전류와 커패시터의 전압이 영으로 될 때 스위치를 동작시키는 부분공진 기법이 적용된다. 또한 제안한 초퍼에 적용된 부분공진 회로는 승압용으로 사용한 인덕터와 스너버 커패시터에 의해 설계되어 초퍼의 회로 토폴로지가 간단하다. 컴퓨터 시뮬레이션과 실험결과를 통해 제안한 DC-DC 초퍼의 타당성이 입증된다.

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부분공진 승압형 AC-DC 컨버터의 입력전류 해석 (Analysis of input current in a Boost AC-DC converter using the partial resonant method)

  • 곽동걸;이경진;박점문;이진호;김영문;이현우
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1995년도 하계학술대회 논문집 A
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    • pp.185-187
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    • 1995
  • A boost converter proposed in this paper operates with high power factor due to input current of sinusoidal waveform. If there were no input LPF, the current is got to be discontinuos form in proportion to AC input voltage magnitude under the constant duty factor switching. Thereupon, the harmonics of input current waveform is reduced and the LPF is made with few elaboration and the control circuit is simple. The switching devices in proposed circuit are operated with soft switching by the partial resonant method. The patial resonant circuit makes use of a reactor using step-up and a capacitor of loss-less snubber. The result is that switching loss is very low and efficiency of system is high.

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A Noel Soft-Switching AC-DC Converter using $L^2SC$

  • Kim C. S.;Lee H. W.;Suh K. Y.;Kim H. D.;Kim K. T.
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 2001년도 Proceedings ICPE 01 2001 International Conference on Power Electronics
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    • pp.271-275
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    • 2001
  • In this paper, proposes a novel AC-DC converter of high power factor and high efficiency by partial resonant method. The input current waveform in proposed circuit is got to be a discontinuous sinusoidal form in proportion to magnitude of ac input voltage under the constant duty cycle switching. Thereupon, the input power factor is nearly unity and the control circuit is simple. Also the switching devices in a proposed circuit are operated with soft switching by the partial resonant method. The result is that the switching loss is very low and the efficiency of system is high. The partial resonant circuit makes use of a inductor using step up and $L^2SC$ (Loss-Less Snubber Condenser). The switching control technique of the converter is simplified for switches to drive in constant duty cycle. Some simulative results and experimental results are included to confirm the validity of the analytical results.

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겹침이음부 및 국부적 층댐퍼를 갖는 보의 횡진동 특성 (Lateral Vibration of Beams with a Bonded Lap Joint and Partial Layered Dampers)

  • 박정일;최낙삼
    • 소음진동
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    • 제9권1호
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    • pp.174-183
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    • 1999
  • An analytical model for the lateral vibration of beams with a bonded lap joint and partial layered dampers has been proposed in this paper. Both shear and normal forces acting along the interface between the elastic and viscoelastic layers were considered in the vibration analysis. Analytical results were compared with those obtained by a finite element method. Effects of the size and location of layers in partial dampers on system loss factor($\eta_s$) and resonant frequency($\omega_r$) were studied. which showed that partial dampers adhered to the site exhibiting the maximum amplitude of vibration were most influential in the increase of $\eta_s$ and the decrease of $\omega_r$. Specific system loss factor( $\eta_s$ divided by total mass of system) was also evaluated in the analysis.

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공진회로(共振回路)를 이용한 유도가열용(誘導加熱用) 부분순환전류형(部分循環電流形) 사이크로콘버터에 관한 연구(硏究) (A Study of the Partial Circulating Current Type Cycloconverter with a Resonant Circuit for Induction Heating)

  • 김현중;조규민;김영석
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1992년도 하계학술대회 논문집 B
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    • pp.1002-1004
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    • 1992
  • This paper presents a study of the partial circulating current type cycloconverter with a resonant circuit for induction heating. A method of input power factor improvement is proposed. Since the circulating currents flow through the circulating current reactors, the out-put currents are continuous and sinusoid. The proposed cycloconverter can keep the displacement factor at 1.0 by PWM control method regardless of load. The control functions are derived, the operational principles are described and the simulation and experimental results are presented.

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