• 제목/요약/키워드: bi-directional DC/DC converter

검색결과 124건 처리시간 0.022초

A New High Efficient Bi-directional DC/DC Converter in the Dual Voltage System

  • Lee Su-Won;Lee Seong-Ryong;Jeon Chil-Hwan
    • Journal of Electrical Engineering and Technology
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    • 제1권3호
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    • pp.343-350
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    • 2006
  • This paper introduces a new high efficient bi-directional, non-isolated DC/DC converter. Through variations of the topology of the conventional Cuk converter, an optimum bi-directional DC/DC converter is proposed. Voltage and current in the proposed DC/DC converter are continuous. Furthermore, the efficiency in both step-up and step-down mode is improved over that of the conventional bi-directional converter. To prove the validation for the proposed converter, simulations and experiments are executed with a 300W bi-directional converter.

양방향으로 동작하는 DC-DC Converter를 이용하는 무선 전력 송수신기 개발 (Development of Wireless Power Transceiver with Bi-directional DC-DC Converter)

  • 문영진;유창식
    • 전자공학회논문지
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    • 제51권7호
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    • pp.111-121
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    • 2014
  • 본 논문에서는 무선으로 전력을 수신할 뿐만 아니라 송신 할 수 있는 기능을 수행하는 무선 전력 송수신기를 위한 양방향으로 동작하는 DC-DC converter를 제안하였다. 일반적으로 무선 전력 송수신기의 경우 2개의 DC-DC converter와 이로 인한 2개의 외부 인덕터가 필요하지만 제안된 DC-DC converter를 적용하여 1개의 DC-DC converter와 1개의 외부 인덕터로 무선 전력 송수신이 가능하도록 하여 전체 시스템의 크기를 줄였다. 제안된 양방향으로 동작하는 DC-DC converter는 $0.35{\mu}m$ BCDMOS 공정을 이용하여 제작하였으며 무선 전력 수신 상황에서 강압 converter로 동작하여 3W의 출력 상황에서 91%의 효율을 가지며 무선 전력 송신 상황에서는 승압 converter로 동작하여 3W의 출력 상황에서 90%의 효율을 갖는다. 양방향으로 동작하는 DC-DC converter와 효율을 극대화 할 수 있는 제안된 기법들을 적용한 무선 전력 송수신기는 수신 상황에서 81.7%, 송신 상황에서 76.5%의 효율을 갖는다.

연료전지용 커패시터 충.방전을 위한 양방향 DC-DC 컨버터 제어기 설계 (The Controller Design of Bi-directional DC-DC Converter for a Fuel Cell Energy Storage System)

  • 김승민;양승대;최주엽;안진웅;이상철;이동하
    • 한국태양에너지학회:학술대회논문집
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    • 한국태양에너지학회 2012년도 춘계학술발표대회 논문집
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    • pp.222-228
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    • 2012
  • This paper presents a design and simulation of bi-directional DC/DC boost converter for a fuel cell system. In this paper, we analyze the equivalent model of both a boost converter and a buck converter. Also we propose the controller of bi-directional DC-DC converter, which has buck mode of charging a capacitor and boost mode of discharging a capacitor. In order to design a controller, we draw bode plots of the control-to-output transfer function using specific parameters and incorporate 3pole-2zero compensator in a closed loop. As a result, it has increased PM(Phase Margin) for better dynamic performance. The proposed bi-directional DC-DC converter's 3pole-2zero compensation method has been verified with computer simulation and simulation results obtained demonstrates the validity of the proposed control scheme.

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EMTP를 이용한 직류배전계통 연계용 양방향 DC/DC 컨버터 모델링 (Modeling of Bi-directional DC/DC Converter for Connecting DC Distribution System using EMTP)

  • 한준;김두웅;오윤식;권기현;노철호;정택현;김철환
    • 전기학회논문지
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    • 제63권5호
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    • pp.615-621
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    • 2014
  • With development of electrical power system, the DC distribution system has been considered as a promising technology to be used in the future smart distribution system. Among the various components comprising the DC distribution system, the bi-directional DC/DC converter is one of the most important equipment to interconnect between main power system and various renewable resources such as photovoltaic power generation, wind power generation, and electrical vehicles. In this paper, a bi-directional DC/DC converter based on three-phases interleaved method which is effective to reduce ripple of input current and output voltage is modeled using ElectroMagnetic Transient Program(EMTP), and the verification of modeled bi-directional DC/DC converter is conducted.

Bus 전압 레귤레이션을 위한 쌍방향 Buck-Boost DC-DC컨버터 (Bi-directional Buck-Boost DC-DC Converter for Bus Voltage Regulation)

  • 고태일;김양모
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1994년도 하계학술대회 논문집 A
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    • pp.348-350
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    • 1994
  • In this paper, bi-directional buck-boost DC-DC converter for bus regulation system is presented. This converter which has one buck and one boost topology achieves bi-directional power flow using a common power inductor and alternative power switches. By connecting the battery to bus line, it can be regulated to bus voltage and charged the battery alternatively. And as an application, a mode controller is adopted to the converter.

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An Improved Soft Switching Bi-directional PSPWM FB DC/DC Converter

  • Kim, Eun-Soo;Joe, Kee-Yeon;Kim, Yoon-Ho;Cho, Yong-Hyun;Choi, Won-Beom
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 1998년도 Proceedings ICPE 98 1998 International Conference on Power Electronics
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    • pp.1042-1046
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    • 1998
  • A new soft switching isolated bi-directional phase shifted pulse width modulation (PSPWM) dc/dc converter is presented. Due to the use of the energy recovery snubber, the isolated bi-directional PSPWM dc/dc converter has a significant reduction of switching losses in the switching devices of the primary and secondary side bridge, respectively. The proposed soft switching bi-directional PSPWM FB dc/dc converter provides an energy recovery snubber which consists of two fast recovery diodes, a resonant capacitor and a resonant inductor. The complete operating principles and simulation results will be presented.

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연료전지·이차전지 하이브리드 시스템을 위한 인터리빙 양방향 DC-DC 컨버터 설계 (The Design of Interleaved Bi-directional DC-DC Converter for Fuel Cell and Battery Hybrid System)

  • 김승민;최주엽;최익;송승호;이상철;이동하
    • 전력전자학회논문지
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    • 제18권1호
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    • pp.45-53
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    • 2013
  • Fuel cell power system is one of the most promising energy source for the alternative energy because it has unique advantages such as high energy density, no power drop during operation, and feasible to make compact size. However, due to very low response time, fuel cell is difficult to correspond to drastic load changes and start-up operation. For solving these problem, fuel cell power system must include energy storage device such as Li-Poly battery or super capacitor. Therefore, bi-directional DC-DC converter must be required for this storage device and fuel cell-PCS control. This paper presents a design and modeling of the bi-directional DC/DC converter. Firstly, we present modeling the boost and buck mode of the bi-directional converter through both PWM switch model and state space averaging technique. Secondly, in order to minimize output ripple and transient response overshoot, we have two identical DC-DC converters interleaved and adopt two-loop voltage-current controller. The proposed bi-directional DC-DC converter's modeling method and control design have been verified with computer simulation and experimentation.

마일드 하이브리드 전기 차량용 2.5kW급 8상 양방향 컨버터에 관한 연구 (Research on a 2.5kW 8-Phase Bi-directional Converter for Mild Hybrid Electric Vehicles)

  • 임재우;김희준;최준삼
    • 한국자동차공학회논문집
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    • 제25권1호
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    • pp.82-91
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    • 2017
  • This paper is a study on the bi-directional DC-DC converter, one of the key elements of 48V-12V dual systems in mild hybrid electric vehicles. Mild hybrid electric vehicles require a bi-directional DC-DC converter that can efficiently transmit power in two directions between a 48V battery and a 12V battery. To develop a bi-directional DC-DC converter with better price competitiveness, upgraded fuel economy, excellent performance and smaller size, this study designed, produced and presented a circuit that improved on the existing one. In the proposed 8-phase bi-directional DC-DC converter, the size of the passive element was reduced through the 8-phase interleaved topology, whereas downscaling had previously posed a difficulty. This study also designed and produced a 2.5kW class prototype. Based on the proposed 8-phase interleaved topology, a size of 227.5 (W) * 172 (L) * 64.35 (H) was achieved. In the boost mode operation and buck operation modes, the maximum efficiency was recorded at 94.04 % and 95.78 %, respectively.

에너지 저장장치를 포함하는 양방향 DC-DC 컨버터 모델링 및 제어기 설계 (The Design of Controller and Modeling for Bi-directional DC-DC Converter including an Energy Storage System)

  • 김승민;양승대;최주엽;최익;안진웅;이상철;이동하
    • 한국태양에너지학회 논문집
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    • 제32권spc3호
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    • pp.235-244
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    • 2012
  • This paper presents a design and simulation of bi-directional DC/DC boost converter for a fuel cell system. In this paper, we analyze the equivalent model of both a boost converter and a buck converter. Also we propose the controller of bi-directional DC-DC converter, which has buck mode of charging a capacitor and boost mode of discharging a capacitor. In order to design a controller, we draw bode plots of the control-to-output transfer function using specific parameters and incorporate proper compensator in a closed loop. As a result, it has increased PM(Phase Margin) for better dynamic performance. The proposed bi-directional DC-DC converter's 3pole-2zero compensation method has been verified with computer simulation and simulation results obtained demonstrates the validity of the proposed control scheme.

배터리 충·방전기 시스템에 적용되는 3상 양방향 절연형 인터리브드 DC-DC 컨버터의 병렬운전 (Parallel Operation of Three-Phase Bi-Directional Isolated Interleaved DC-DC Converters for The Battery Charge/Discharge System)

  • 조현식;이재도;차한주
    • 전력전자학회논문지
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    • 제19권1호
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    • pp.15-22
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    • 2014
  • Recently, parallel operation of dc-dc converters has been widely used in distributed power systems. In this paper, a control method to achieve parallel operation of three-phase bi-directional isolated interleaved dc-dc converters is discussed for the battery charging and discharging system which consists of the 32 battery charger/dischargers and two three-phase bi-directional isolated interleaved dc-dc converters. In the boost mode, the battery energy is delivered to the grid, whereas the grid energy is transferred to the battery in the buck mode operation. The average current sharing control method is employed to obtain an equal conducting of each phase current in the three-phase dc-dc converter. By using the proposed method, the imbalance factor is gratefully reduced from 8 percent to 1 percent. Two 2.5kW three-phase bi-directional dc-dc converter prototype have been built and the proposed method has been verified through experiments.