• 제목/요약/키워드: SEPIC converter.

검색결과 46건 처리시간 0.025초

용량성 아이들링 SEPIC의 분석 및 구현 (Analysis and Hardware Implementation of the Capacitive Idling SEPIC)

  • 최동훈;조경현;한완옥;이성백
    • 대한전자공학회:학술대회논문집
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    • 대한전자공학회 2001년도 하계종합학술대회 논문집(5)
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    • pp.107-110
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    • 2001
  • The capacitive idling SEPIC(Single Ended primary Inductance Converter) is derived from the SEPIC topology. This converter is suitable for maximizing Li-Ion battery life in portable equipments. Besides, that makes it possible to increase the switching frequency without a additional circuitry This paper is presented the characteristics of the capacitive idling SEPIC and experimental waveforms of the devices in continuous current mode.

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새로운 양방향 ZVS PWM Sepic/Zeta DC-DC 컨버터 (New Bidirectional ZVS PWM Sepic/Zeta DC-DC Converter)

  • 김인동;팽성환;박성대;노의철;안진우
    • 전기학회논문지
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    • 제56권2호
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    • pp.301-310
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    • 2007
  • Bidirectional DC-DC converters allow transfer of power between two dc sources, in either direction. Due to their ability to reverse the direction of flow of power, Dey are being increasingly used in many applications such as battery charge/dischargers, do uninterruptible power supplies, electrical vehicle motor drives, aerospace power systems, telecom power supplies, etc. This Paper Proposes a new bidirectional Sepic/Zeta converter. It has low switching loss and low conduction loss due to auxiliary communicated circuit and synchronous rectifier operation, respectively Because of positive and buck/boost-like DC voltage transfer function(M=D/1-D), the proposed converter is very desirable for use in distributed power system. The proposed converter also has both transformer-less version and transformer one.

절연형 Inverse-SEPIC의 모델링 및 제어 특성 (Modeling and Control Characteristics of Isolated Inverse-SEPIC)

  • 박한얼;김은석;김수석;송중호
    • 전력전자학회논문지
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    • 제13권1호
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    • pp.1-8
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    • 2008
  • 상태 공간 평균화법을 이용하여 절연형 inverse-SEPIC(Isolated Inverse-SEPIC)의 동적 모델링을 정립하고, 그 제어특성을 해석한다. 정상 상태 해석을 통해 회로의 주요 소자들에 대한 설계식을 유도한다. 근 궤적과 주파수 해석을 통해 II-SEPIC의 동특성 및 제어 특성을 파악하여, 적절한 제어성능을 가지는 제어기를 설계한다. 본 논문에서 제시하는 방법에 따라 설계된 II-SEPIC의 회로파라미터 및 전압제어기를 포함한 전체 제어시스템의 시뮬레이션과 실험을 수행한다. 시뮬레이션과 실험결과는 논문에서 제시한 모델링 및 제어기 설계방법의 타당성 및 유용성을 확인시켜 주고 있다.

Sensorless Passivity Based Control of a DC Motor via a Solar Powered Sepic Converter-Full Bridge Combination

  • Linares-Flores, Jesus;Sira-Ramirez, Hebertt;Cuevas-Lopez, Edel F.;Contreras-Ordaz, Marco A.
    • Journal of Power Electronics
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    • 제11권5호
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    • pp.743-750
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    • 2011
  • This article deals with the sensor-less control of a DC Motor via a SEPIC Converter-Full Bridge combination powered through solar panels. We simultaneously regulate, both, the output voltage of the SEPIC-converter to a value larger than the solar panel output voltage, and the shaft angular velocity, in any of the turning senses, so that it tracks a pre-specified constant reference. The main result of our proposed control scheme is an efficient linear controller obtained via Lyapunov. This controller is based on measurements of the converter currents and voltages, and the DC motor armature current. The control law is derived using an exact stabilization error dynamics model, from which a static linear passive feedback control law is derived. All values of the constant references are parameterized in terms of the equilibrium point of the multivariable system: the SEPIC converter desired output voltage, the solar panel output voltage at its Maximun Power Point (MPP), and the DC motor desired constant angular velocity. The switched control realization of the designed average continuous feedback control law is accomplished by means of a, discrete-valued, Pulse Width Modulation (PWM). Experimental results are presented demonstrating the viability of our proposal.

Design of a Digital PWM Controller for a Soft Switching SEPIC Converter

  • Nashed, Maged N.F.
    • Journal of Power Electronics
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    • 제4권3호
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    • pp.152-160
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    • 2004
  • This paper presents analysis, modeling, and design of a low-harmonic, isolated, active-clamped SEPIC for future avionics applications. Simpler converter dynamics, high switching frequency, zero voltage-Transition-PWM switching, and a single-layer transformer construction result. This paper describes complete design of a digital controller for a high-frequency switching power supply. Guidelines for the minimum required resolution of the analog-to-digital converter, the pulse-width modulator, and the fixed-point computational unit is derived. A design example based on a SEPIC converter operating at the high switching frequency is presented. The controller design is based on direct digital design approach and standard root-locus techniques.

단일 변압기를 사용한 SEPIC-Flyback 컨버터의 연료전지 발전 시스템 (A Fuel Cell Generation System of SEPIC-Flyback Converter using a Single Transformer)

  • 강구삼;장수진;이태원;김수석;원충연
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 2005년도 전력전자학술대회 논문집
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    • pp.357-359
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    • 2005
  • In this paper, a new SEPIC-Flyback converter with a single transformer has been proposed, which is suitable for a fuel cell based power generation system. The proposed converter is superposition of sepic and flyback converter mode. It has outstanding high boosting output voltage, component utilization and high efficiency characteristics under the inherently severe low output voltage of the fuel cell generator. The proposed converter for a full cell generator is described and verified by simulation and experimental result that make used of the Polymer Electrolyte Membrane Fuel Cell(PEMFC) Generator.

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연료전지 시스템용 SEPIC-Flyback Converter의 설계 및 제어 (Design and control of the SEPIC-Flyback converter for Fuel Cell generator system)

  • 강구삼;장수진;이태원;김수석;원충연
    • 한국조명전기설비학회:학술대회논문집
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    • 한국조명전기설비학회 2005년도 춘계학술대회논문집
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    • pp.467-472
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    • 2005
  • In this paper, design and control of the novel SEPIC-Flyback converter(SF converter) is developed as a possible converter for fuel cell system. This output characteristic of SF converter is similar to Buck-Boost converter in that it can step-up or step-down the voltage. With the small signal equivalent circuit modeling of SF converter, control-to-output transfer function is obtained. SF converter couples up the inductive type converter to capacitive type converter with one transformer, which has less ripple current than its respective one does. To verify the validity of the proposed converter, 500W, 100kHz converter is designed and tested. ZVS switching and active clamping are also tested in practice.

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연료전지 발전시스템에 적합한 새로운 능동 클램프 Sepic-Flyback 컨버터의 개발 (Design of Suitable a New Active Clamp Sepic-Flyback Converter for a Fuel Cell Generation System)

  • 이태원;장수진;김수석;이병국;김학성;원충연
    • 전력전자학회논문지
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    • 제11권3호
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    • pp.258-265
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    • 2006
  • 풍력, 태양광, 연료전지와 같은 신 재생 에너지에 관한 연구가 활발해 지면서 컨버터, 인버터와 같은 PCS (Power Conditioning System)의 연구가 활발히 진행되고 있다. 그러나, 부하에 따라 가변되는 저전압, 대전류, 출력특성을 갖는 연료전지 발전 시스템에서는 PCS의 연구 및 개발이 어려운 실정이다. 본 논문에서는 연료전지를 이용한 발전시스템에 알맞은 능동 클램프 sepic-flyback 컨버터를 제안한다. 제안된 컨버터는 중간 탭 변압기를 이용하여 sepic, flyback 컨버터를 결합한 구조를 가진다. 변압기를 이용하는 종래의 토폴로지에 비해 변압기 이용률을 높일 수 있고, 변압기의 변환 비 및 파워 스위치 소자의 수를 줄일 수 있으며, 고효율 운전특성을 갖는다. 본 논문에서는 시뮬레이션과 실험을 통하여 컨버터의 동작특성을 비교 분석하였으며, PEMFC (Proton Exchange Membrane Fuel Cell)을 이용하여 제안된 컨버터의 타당성을 검증하였다.

Design and Analysis of SEPIC Converter Based MPPT for Solar PV Module with CPWM

  • Maglin, J.R.;Ramesh, R.;Vaigundamoorthi, M.
    • Journal of Electrical Engineering and Technology
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    • 제9권4호
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    • pp.1269-1276
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    • 2014
  • The main objective of this paper is to design DC-DC MPPT circuit using chaotic pulse width modulation to track maximum power from solar PV module for space application. The direct control method of tracking is used to extract maximum power. The nominal duty cycle of the main switch of DC-DC SEPIC converter is adjusted so that the solar panel output impedance is equal to the input resistance of the SEPIC converter which results better spectral performance in the tracked voltages when compared to conventional PWM control. The conversion efficiency of the proposed MPPT system is increased when CPWM is used as a control scheme

Analysis and Design of a Soft-Switched PWM Sepic DC-DC Converter

  • Kim, In-Dong;Kim, Jin-Young;Nho, Eui-Cheol;Kim, Heung-Geun
    • Journal of Power Electronics
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    • 제10권5호
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    • pp.461-467
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    • 2010
  • This paper proposes a new soft-switched Sepic converter. It has low switching losses and low conduction losses due to its auxiliary communicated circuit and synchronous rectifier operation, respectively. Because of its positive and buck/boost-like DC voltage transfer function (M=D/(1-D)), the proposed converter is desirable for use in distributed power systems. The proposed converter has versions both with and without a transformer. The paper also suggests some design guidelines in terms of the power circuit and the control loop for the proposed converter.