• 제목/요약/키워드: three-phase Interleaved DC-DC converter

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5kW 배터리 충전기용 양방향 3상 인터리브드 DC-DC 컨버터 설계 및 실험 (Design and Experiment of Three-phase Interleaved DC-DC Converter for 5kW Lead-Acid Battery Charger)

  • 이우종;엄주경;한병문;차한주
    • 전력전자학회논문지
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    • 제16권3호
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    • pp.227-233
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    • 2011
  • 본 논문은 5kW 배터리 충전기용 3상 인터리브드 DC-DC 컨버터 설계 및 실험에 대하여 서술하였으며, 배터리 시스템은 풍력 시스템의 안정화를 위해 사용한다. 배터리 충전기는 배터리, 3상 인터리브드 양방향 DC-DC 컨버터, 직류단, 계통연계형 인버터로 구성된다. 납축전지는 matlab으로 간단한 R-C모델링 하였으며, 스텝 전류 방전 실험에 따라 배터리 파라미터를 구하였다. 3상 인터리브드 DC-DC 컨버터를 이용해 배터리의 전류 리플을 감소시켰으며, 5kW 배터리 충전기를 제작하여 충·방전모드 제어기를 설계하고 실험하였다.

주파수 변조 방식 3상 인터리브드 양방향 DC-DC 컨버터의 과도상태 과전류를 최소화하기 위한 스위칭 기법 (A Switching Method for Minimizing the Over Current in Transient Response of 3-phase Interleaved Bidirectional DC-DC Converter with Frequency Modulation)

  • 배종우;정혜수;정재헌;노의철
    • 전력전자학회논문지
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    • 제21권6호
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    • pp.530-537
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    • 2016
  • This work deals with a switching method for minimizing overcurrent in a three-phase interleaved bidirectional DC-DC converter with frequency modulation. Generally, a three-phase interleaved DC-DC converter is used to reduce a current ripple component. The combined operation of three-phase and two-phase converters can significantly reduce the ripple component. However, the conventional PWM method cannot solve severe overcurrent during phase transfer or frequency variation for power control. To overcome this problem, this work proposes a new PWM switching method. A 3 kW DC-DC power converter is designed and implemented, and the converter is operated in discontinuous current mode with varying switching frequencies for power control. Simulation and experimental results show the validity of the proposed switching method. The proposed switching method can be widely used in the field of current ripple reduction for three-phase interleaved bidirectional DC-DC converters.

입·출력 전압 변동을 고려한 3상 인터리브드 양방향 DC-DC컨버터의 전류리플 저감 기법 (Current Ripple Reduction Method of 3-phase Interleaved Bidirectional DC-DC Converter with the Consideration of Input and Output Voltage Variation)

  • 선다운;정재헌;노의철;정규범
    • 전력전자학회논문지
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    • 제21권5호
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    • pp.427-433
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    • 2016
  • This paper proposes a new method for the current ripple reduction of a three-phase interleaved bidirectional DC-DC converter. Usually, the three-phase interleaved bidirectional DC-DC converter is used for battery charging and discharging to reduce battery current ripple. In V2G application, a PWM AC-DC converter is used to connect the AC power grid and three-phase interleaved bidirectional DC-DC converter for battery charging and discharging. The magnitude of DC link voltage affects the battery current ripple magnitude. Therefore, the magnitude of the battery ripple current is analyzed with variations of battery and DC link voltages. The ripple current magnitude is found to be minimized by controlling the DC link voltage. Simulation and experimental results show the usefulness of the proposed method.

넓은 범위 입력전압에 소프트 스위칭이 가능한 양방향 인터리브드 DC-DC 컨버터 (Bidirectional Soft Switching Three-Phase Interleaved DC-DC Converter for a Wide Input Voltage Range)

  • 최우진;이교범;정규범
    • 전력전자학회논문지
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    • 제20권4호
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    • pp.313-320
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    • 2015
  • This study deals with a bidirectional interleaved soft switching DC-DC converter for a wide range of input voltages. The proposed converter operates in complementary switching with the purpose of inductor size reduction and zero-voltage switching (ZVS) operation. The current ripple related to complementary switching is minimized by three-phase interleaved operation. The main characteristics of the proposed topology are its soft-switching method of operation and its simple structure. The soft-switching operation and the system efficiency of the proposed converter are verified by experimental results.

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.

하이브리드 자동차 고전압 배터리 충, 방전을 위한 49kW급 고효율 양방향 DC/DC 컨버터 설계 (Design of a 49kW high efficiency bidirectional DC-DC converter for charge and discharge of high voltage battery in HEV)

  • 양진영;윤창우;박성식;최세완;박래관;장서건
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 2007년도 추계학술대회 논문집
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    • pp.21-23
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    • 2007
  • In this paper a high efficiency bi-directional DC-DC converter for hybrid vehicles is proposed. The proposed converter a three-phase half-bridge interleaved ZVS converter, is designed to have high efficiency in the main operation range. The component ratings are calculated, the actual devices are selected, and the efficiency analysis has been performed to determine optimal ZVS range. The input and output current ripples are significantly reduced due to the interleaved operation. The dual loop control for the interleaved three-phase converter is also presented. To confirm the proposed convert ter, The simulation and experimental results are presented.

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넓은 부하영역에서 고효율을 얻기 위한 3상 인터리브드 양방향 DC-DC 컨버터의 스위칭 기법 (Switching Method of 3-phase Interleaved Bidirectional DC-DC Converter to Achieve High Efficiency in Wide Load Range)

  • 정재헌;서보길;선다운;노의철
    • 전기학회논문지
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    • 제64권9호
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    • pp.1306-1314
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    • 2015
  • This paper deals with a switching method of a three-phase interleaved bidirectional DC-DC converter to obtain high efficiency in wide load range. The proposed soft-switching method provides ZVS and ZCS at turn-on, and ZVS at turn-off of the switch as well as considerably reduced conduction loss in light load. Simulation and experiment are carried out with a bidirectional DC-DC converter having the power rating of 3 [kW], and those results show the validity of the proposed switching method.

인터리브 방식 삼상 절연형 고효율 부스트 컨버터 (Three-Phase Interleaved Isolated High Efficiency Boost Converter)

  • 최정완;차한주
    • 전력전자학회논문지
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    • 제14권6호
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    • pp.496-503
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    • 2009
  • 이 논문은 새로운 인터리브 방식 삼상 절연형 고효율 부스트 컨버터를 제안한다. 이 컨버터는 삼상 전력변환 방식을 채택하여 보다 큰 전력전송 능력을 갖으며 각 상의 rms 전류값이 작으므로 전도손실도 작다. 이에 더하여, 삼상 부스트 컨버터의 인터리브 동작으로 인하여 입력 전류 리플이 줄어들고, 실효 동작 주파수의 증가로 필터소자의 크기가 작아져서 높은 전력밀도를 갖는다. 부스트 컨버터 출력의 각 상 전류는 제안된 3 상 PWM 구동방식에 따라 전류 연속모드로 동작하여 3 상 변압기로 통합된다. 이 컨버터는 전도손실이 작아 96% 이상의 효율로 동작하며 능동클램프의 작용으로 스위칭 손실도 역시 작다. 제안된 컨버터와 PWM 구동방식을 분석 및 시뮬레이션 하고 하드웨어로 제작하였다. 제작된 시제품을 500 W 급으로 실험하여 모든 설계검증 및 해석을 실시하였다.

A Phase Current Reconstruction Technique Using a Single Current Sensor for Interleaved Three-phase Bidirectional Converters

  • Lee, Young-Jin;Cho, Younghoon;Choe, Gyu-Ha
    • Journal of Electrical Engineering and Technology
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    • 제11권4호
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    • pp.905-914
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    • 2016
  • This paper proposes a new phase current reconstruction technique for interleaved three-phase bidirectional dc-dc converters using a single current sensor. In the proposed current reconstruction algorithm, a single current sensor is employed at the dc-link, and the dc-link current information is sampled at either the peak or valley point of the pulse-width modulation (PWM) carriers regularly. From the obtained current information, all phase currents are reconstructed in a single PWM cycle. After that, the digital current controller is applied to achieve current balancing in each phase. Compare to the previous multiple current sensor method, the proposed strategy reduces the number of the current sensors in the interleaved three-phase bidirectional converter as well as reducing potential current sensing error caused by non-ideal characteristics of the multiple current sensors. The effectiveness of the proposed method is verified from the experiments based on a 3kW three-phase bidirectional converter prototype for the automotive battery charging application.

3상 인터리브드 양방향 DC-DC 컨버터의 전류리플을 저감하기 위한 새로운 제어기법 (New Control Method for the Current Ripple Reduction of 3-phase Interleaved Bidirectional DC-DC Converter)

  • 정재헌;김지현;노의철;김흥근;전태원
    • 전력전자학회논문지
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    • 제21권3호
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    • pp.260-266
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    • 2016
  • A new method for the current ripple reduction of a three-phase interleaved bidirectional DC-DC converter is proposed. The converter used in this study operates in discontinuous mode to minimize the switching losses. All the switches are turned on at ZVS and ZCS conditions, and turned off at ZVS condition. The charging and discharging power of the battery is controlled by varying the switching frequency while maintaining the discontinuous mode operation. A 3 kW 20 kHz power converter is designed and implemented. Simulation and experimental results show the validity of the proposed method. The proposed control method can be used to reduce the battery ripple current significantly.