• Title/Summary/Keyword: Boost 컨버터

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Novel Self-Excited DC-DC Converters (새로운 자려식 DC-DC 컨버터)

  • Lee, Soung-Ju;Ahn, Tae-Young
    • Proceedings of the KIEE Conference
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    • 1999.07f
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    • pp.2505-2507
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    • 1999
  • This paper presents novel self excited DC-DC converters such as Buck-boost type, Buck type and also non-inverting Buck-boost type. The proposed converters has the following advantages: simple topology, small number of circuit components, easy control methode. Therefore, these converters are suitable for the portable appliances with battery source. Theoretical analysis and experimental results for SOW class Buck-boost type self oscillation DC-DC converter have been obtained, which demonstrate the high efficiency and good performance.

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A Study on the Two Phase with interleaved Boost Converter (부스트 컨버터의 2상 2중화에 관한 연구)

  • Sin, C.J.;Han, K.H.;Son, Y.I.;Jeong, Y.S.
    • Proceedings of the KIEE Conference
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    • 2008.10c
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    • pp.139-141
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    • 2008
  • In this paper, the authors study the boost converter as a DC-DC converter like a Power supply and describe the investigation result about the two phase with interleaved boost converter which has the same effect that the switching frequency of the solid-state-switch is two times. As a result, the ripple of the input current and output current is better improved.

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Characteristic of Boost input type active clamp DC-DC converter (Boost 입력형 능동클램프 DC-DC 컨버터의 동작특성)

  • Ceong, Cin-Beom;Kim, Hee-Jun
    • Proceedings of the KIEE Conference
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    • 2001.04a
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    • pp.301-303
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    • 2001
  • This paper proposes the boost input type active clamp DC-DC converter featuring the high efficiency and improved EMI characteristics. The main characteristic of the converter is to operate with the non-pulsating input and output currents. Besides, it has the zero-voltage switching (ZVS) and low voltage stress characteristics. For the proposed converter, the detailed operation principles and the simulation results are presented.

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Pulse Generator Using Series-Connected Boost Converter (승압형 컨버터의 직렬 배열에 의한 펄스전압 발생회로)

  • 백주원;유동욱;김태진;류명효;조기연;김흥근
    • The Transactions of the Korean Institute of Electrical Engineers B
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    • v.52 no.4
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    • pp.170-176
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    • 2003
  • This paper introduces an improved pulse generator using power semiconductors and L-C circuit. The proposed circuit consists of the series connected boost converter structure. In the presented circuits, high voltage pulse is generated by series-connection of capacitors and IGBTs. The charging of capacitors and voltage balance of IGBTs are obtained automatically. To verify the proposed circuit, 1.8㎸, 40A pulse generator is manufactured and tested.

Comparison of efficiency according to Non-inverting Buck-Boost Converter Modulation (단상 비 반전 벅-부스트 컨버터 모듈레이션 방법에 따른 효율 비교)

  • Yoon, Dongkwan;Cho, Younghoon
    • Proceedings of the KIPE Conference
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    • 2018.11a
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    • pp.203-204
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    • 2018
  • Conventional buck-boost converter has the disadvantage that the output voltage is inverted. The single phase non-inverting buck-boost converter(SPNIBBC) used four swithes has H-bridge type Circuit. The output voltage is not inverted. The SPNIBBC can be controlled by the single carrier method and the dual carrier method according to the modulation method. In this paper, we have fabricated the converter and compared the efficiency according to the modulation method.

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Bi-directional DC-DC Converter Design and Control for step-up/step-down (승강압용 양방향 DC-DC컨버터 설계 및 제어)

  • Won, Chung-Yuen;Jang, Su-Jin;Lee, Tae-Won;Lee, Byoung-Kuk;Kim, Soo-Suck
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.20 no.5
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    • pp.49-56
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    • 2006
  • The bi-directional converter interfaces the low voltage battery to the inverter do link of FC generation system. When power flows from the low voltage side(battery: 48[V]) to the high voltage side(dc link: 380[V]), the circuit works in discharge mode (boost) to power the high voltage side load; otherwise, it works in charge mode (buck) to charge the low voltage side battery. In this paper, the 1.5[kW] active clamp current-fed full bridge converter employing MOSFETs is operated to discharge the battery whereas a voltage-fed half bridge converter employing IGBTs is operated to charge the battery.

The Concentrating Photovoltaic System using a Solar Tracker (태양위치 추적 장치를 이용한 집광형 태양광 발전시스템)

  • Yoo, Yeong-tae;Na, Seung-kwon
    • Journal of Advanced Navigation Technology
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    • v.21 no.4
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    • pp.377-385
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    • 2017
  • The solar cell need the characteristic interpreting because the solar cell changes greatly according to the isolation, temperature and load in the photovoltaic development. Moreover, to get many energy in photovoltaic development need the position tracking of the sun according to the environment change. Also, The solar cells should be operated at the maximum power point. In this paper, I used microprocessor and sensor and designed to improve the efficiency of the photovoltaic system the photovoltaic position tracker device, and compared the normal photovoltaic system of fixed form with the photovoltaic system of solar position tracked form. Moreover, compared the catalogue of solar cell module and the simulation through a mathematics modelling with the solar cell's characteristic interpreting and composed an power conversion system with boost converter and voltage source inverter. Used the constant voltage control method for maximum power point tracking in boost converter control and, used the SPWM(Sinusoidal Pulse Width Modulation) control method in inverter control. The result was less then 5% when compared the catalogue of solar cell module and the simulation through a mathematics modelling. The boost rate of boost converter was similar to 167 % with the simulation.

A New Pulse Frequency Modulation(PFM) Series Boost Capacitor(SBC) Full Bridge DC/DC Converter (새로운 주파수 가변형(PFM) 직렬 부스트 캐패시터(SBC) 풀 브리지 DC/DC 컨버터)

  • Shin, Yong-Saeng;Jang, Young-Su;Roh, Chung-Wook;Hong, Sung-Soo;Lee, Hyo-Bum;Han, Sang-Kyoo
    • The Transactions of the Korean Institute of Power Electronics
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    • v.14 no.2
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    • pp.120-127
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    • 2009
  • This paper proposes a new Pulse Frequency Modulation(PFM)-Series Boost Capacitor(SBC) full bridge DC/DC Converter which features a high efficiency and high power density. The proposed converter controls the output voltage by varying the voltage across the series boost capacitor according to switching frequency and has no freewheeling period due to 50% fixed duty operation. As a result, its conduction loss is lower than that of the conventional phase shift full bridge converter. Moreover, ZVS of all power switches can be ensured along wide load ranges and output current ripple is very small. Therefore, it has very desirable merits such as a small output inductor, high efficiency, and improved heat generation. This paper performs a rationale and PSIM simulation of the proposed converter. Finally, experimental results from a 1.2kW(12V, 100A) prototype are presented to confirm the operation, validity and features of the proposed converter.

Generalized Circulating Current Control Method in Parallel Three-Phase Boost Converters (병렬 삼상 부스트 컨버터에서 일반화된 순환전류 제어 방법)

  • Lim, Chang-Soon;Lee, Kui-Jun;Kim, Rae-Young;Hyun, Dong-Seok
    • The Transactions of the Korean Institute of Power Electronics
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    • v.16 no.3
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    • pp.250-257
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    • 2011
  • This paper analyzes characteristic of the three-phase coupled inductor connected to ac source to effectively mitigate the high-frequency circulating current generated in parallel three-phase boost converters. The three-phase coupled inductor analysis presented in this paper uses the three-phase coupled inductor structure and voltage equations. Based on this analysis, the three-phase coupled inductor is added to the conventional low-frequency averaged model. As a result, the novel averaged model which can reduce the low and high-frequency circulating current simultaneously is developed. Using the zero-sequence component of the novel averaged model, each total inductance to the circulating current of the three-phase coupled inductor and line inductor can be obtained. Simulation and experiment results verify the usefulness of three-phase coupled inductor in parallel three-phase boost converters.

Development of 1.8MW-class Battery Charger & Discharger for ESS (1.8MW급 ESS용 배터리 충방전기 개발)

  • Kim, Y.W.;Lee, C.H.
    • Proceedings of the KIPE Conference
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    • 2013.11a
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    • pp.184-185
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    • 2013
  • 본 논문은 1.8MW 급 ESS용 배터리 충방전기 개발에 관한 논문이다. 제안된 회로의 구성은 삼상 교류 입력을 받아 DC 1150V로 변환시키는 3상 AC/DC 컨버터부와 배터리를 충전과 방전시키는 buck-boost 컨버터부로 구성된다. 출력은 최대 900V, 2000A 이며 C/C, C/V, C/P 모드로 제어된다. 3상 AC/DC 컨버터는 역률을 개선하고, 입력 고조파를 저감시킬 수 있으며, 계통으로 회생이 가능하다는 장점이 있다. 시뮬레이션 및 실험을 통하여 배터리 충방전기의 성능을 검증하였으며, 실제 시스템에 적용하여 충전 및 방전 시험을 완료하였다.

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