• Title/Summary/Keyword: Partial resonant method

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

  • 김영철;이현우
    • Proceedings of the KIPE Conference
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    • 1998.11a
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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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A Soft switching method for Loss reduction of Inverter (인버터의 손실저감을 위한 소프트 스위칭기법)

  • 곽동걸;김영철;이현우
    • Proceedings of the IEEK Conference
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    • 2001.06e
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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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A New Partial Resonant Switching $3\phi$ Boost Converter with High Efficiency Using Lossless Snubber (새로운 무손실 스너버를 이용한 부분공진형 고효율 $3\phi$ AC-DC 부스터 컨버터)

  • 전종함;서기영;이현우
    • Journal of the Korean Institute of Telematics and Electronics S
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    • v.34S no.9
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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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High Power Factor and High Efficiency DC-DC Converter using Single-Pulse Soft-Switching (단일 펄스 소프트 스위칭을 이용한 고역률 고효율 DC-DC 컨버터)

  • Jung, S.H.;Kwon, S.K.;Suh, K.Y.;Lee, H.W.;Gac, D.K.;Kim, Y.C.
    • Proceedings of the KIEE Conference
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    • 2003.07b
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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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The Utility Interaction type PV system by using partial resonant system (부분공진기법을 이용한 연계형 태양광발전시스템)

  • 고강훈;이현우;김영철;최광주
    • Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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    • 1999.11a
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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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A Study on ZVCS DC-DC Chopper by using Partial Resonant Method (부분공진 기법이 적용된 ZVCS DC-DC 초퍼에 관한 연구)

  • Kwak, Dong-Kurl
    • Journal of the Microelectronics and Packaging Society
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    • v.15 no.1
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    • pp.59-64
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    • 2008
  • Recently, DC-DC choppers must be increased switching frequency in order to achieve a small size, a light weight and a low noise. However, the switches of chopper are subjected to high switching power losses and switching stresses. As a result of these, the chopper system bring on a low power efficiency. To improved these, this paper is studied on a new DC-DC chopper of high efficiency operated with soft switching(that is, zero current switching and zero voltage switching, ZVCS), of semiconductor switches using in chopper. The soft switching operation is applied to a partial resonant method that the switches operate at zero current of inductor and zero voltage of capacitor in resonant circuit. And the partial resonant circuit makes use of a inductor using step-up and a snubber capacitor, the circuit topology of chopper is simple. Some simulative results on computer and experimental results confirm the validity of analytical results of the DC-DC chopper.

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

  • Kwak, Dong-Kurl;Lee, Kyung-Chin;Park, Jum-Mun;Lee, Jin-Ho;Kim, Young-Mun;Lee, Hyun-Woo
    • Proceedings of the KIEE Conference
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    • 1995.07a
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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.
    • Proceedings of the KIPE Conference
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    • 2001.10a
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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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Lateral Vibration of Beams with a Bonded Lap Joint and Partial Layered Dampers (겹침이음부 및 국부적 층댐퍼를 갖는 보의 횡진동 특성)

  • 박정일;최낙삼
    • Journal of KSNVE
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    • v.9 no.1
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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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A Study of the Partial Circulating Current Type Cycloconverter with a Resonant Circuit for Induction Heating (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))

  • Kim, Hyun-Jung;Cho, Kyu-Min;Kim, Young-Seok
    • Proceedings of the KIEE Conference
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    • 1992.07b
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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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