• Title/Summary/Keyword: Interleaved DC-DC Converter

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

  • Lee, Wu-Jong;Eom, Ju-Kyoung;Han, Byung-Moon;Cha, Han-Ju
    • The Transactions of the Korean Institute of Power Electronics
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    • v.16 no.3
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    • pp.227-233
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    • 2011
  • This paper proposes a design and experiment of three phase interleaved dc-dc converter for 5kW battery charger. The charger consists of a three-phase interleaved dc-dc converter, which interfaces batteries and DC link, and a grid connected inverter. Lead-acid battery is modeled in a simple R-C model by matlab. Parameters of the battery are estimated based on step current discharging test. The battery is connected to three-phase interleaved DC-DC converter in order to reduce the ripple current to the battery and so, increase the lifetime of battery. Controller for charging and discharging mode is designed and tested in a 5kW charger prototype.

Switching Losses Analysis of the Interleaved ZCT DC-DC Converter with Current Conduction Modes (전류전도모드에 따른 Interleaved ZCT DC-DC Converter의 스위칭 손실 분석)

  • Cha, Dae-Joong;Baek, Ji-Eun;Ko, Kwang-Cheol
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.29 no.1
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    • pp.80-85
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    • 2015
  • In the issues of interleaved topology which have been in limelight as high power converter, various soft-switching methods are studied to reduce switching losses in high power application. The interleaved ZCT converter has an additional filter inductor to reduce losses of diodes during reverse recovery process. However, additional current conduction modes are occurred by the inductor, we need to analyze switching losses with inductor values on each mode. In this paper, current conduction modes and boundary conditions of interleaved ZCT converter are analyzed. In the conclusion, the minimum of switching losses in converter operation modes is analyzed by calculating switching losses.

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

  • Sun, Daun;Jung, Jae-Hun;Nho, Eui-Cheol;Joung, Gyu-Bum
    • The Transactions of the Korean Institute of Power Electronics
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    • v.21 no.5
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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.

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

  • Bae, Jongwoo;Jeong, Hyesoo;Jung, Jae-Hun;Nho, Eui-Cheol
    • The Transactions of the Korean Institute of Power Electronics
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    • v.21 no.6
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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.

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

  • Choi, Woo-Jin;Lee, Kyo-Beum;Joung, Gyu-Bum
    • The Transactions of the Korean Institute of Power Electronics
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    • v.20 no.4
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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.

Analysis of Current Ripple for Two-Phase Interleaved Boost PFC (2상 인터리브드 부스트 PFC의 전류 리플 해석)

  • Kim, Jung-Hoon;Jeon, Tae-Hyun
    • The Transactions of the Korean Institute of Electrical Engineers P
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    • v.61 no.3
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    • pp.122-128
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    • 2012
  • An interleaved boost converter has many advantages such as current ripple reduction, switching effective double, etc. Due to these advantages, the interleaved boost converter applies to the power factor correction circuit. However, there are almost no analysis results because the input voltage and current are time-varying system in the power factor correction application. Therefore, in this paper, the current ripples of the power factor correction circuit using single-phase boost dc-dc converter and 2-phase interleaved boost dc-dc converter are compared and analyzed in detail. In order to verify the validity, computer simulation and experimental are performed.

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

  • Jung, Jae-Hun;Seo, Bo-Gil;Sun, Daun;Nho, Eui-Cheol
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.64 no.9
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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.

Model-Based Predictive Control for Interleaved Multi-Phase DC/DC Converters (다상 인터리브드 DC/DC 컨버터를 위한 모델기반의 예측 제어기법)

  • Choi, Dae-Keun;Lee, Kyo-Beum
    • The Transactions of the Korean Institute of Power Electronics
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    • v.19 no.5
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    • pp.415-421
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    • 2014
  • This study proposes a model-based predictive control for interleaved multi-phase DC/DC converters. The power values necessary to adjust the output voltage in the succeeding are predicted using a converter model. The output power is controlled by selecting the optimal duty cycle. The proposed method does not require controller loops and modulators for converter switching. This method can control the converter by calculating the optimal duty cycle, which minimizes the error between the reference and actual output voltage. The effectiveness of the proposed method is verified through simulations and experiments.

Study on the High Efficiency Bi-directional DC/DC Converter Topology Using Multi-Phase Interleaved Method (Multi-Phase 인터리브드 방식을 이용한 고효율 양방향 DC/DC 컨버터 토폴로지에 관한 연구)

  • Choi, Jung-Sik;Park, Byung-Chul;Chung, Dong-Hwa;Oh, Seung-Yeol
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.29 no.2
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    • pp.82-90
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    • 2015
  • This paper proposes an efficient bi-directional DC/DC converter topology using multi-phase interleaved method for power storage system. The proposed converter topology is used for a power storage system using a vanadium redox flow battery(VRFB) and is configured to enable bidirectional power flow for charging and discharging of VRFB. Proposed DC/DC converter of the 4 leg method is reduced to 1/4 times the rating of the reactor and the power semiconductor device so can be reduce the system size. Also, proposed topology is obtained the effect of four times the switching frequency as compared to the conventional converter in each leg with a 90 degree phase shift 4 leg method. This can suppress the reduction of the life of the secondary battery because it is possible to reduce the current ripple in accordance with the charging and discharging of VRFB and may increase the efficiency of the entire system. In this paper, it proposed bidirectional high-efficiency DC/DC converter topology Using multi-phase interleaved method and proved the validity through simulations and experiments.

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

  • Yang, Jin-Young;Yoon, Chang-Woo;Park, Sung-Sik;Choi, Se-Wan;Park, Rae-Kwan;Chang, Seo-Geon
    • Proceedings of the KIPE Conference
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    • 2007.11a
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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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