• Title/Summary/Keyword: three-phase 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.

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.

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.

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.

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

  • Jo, Hyunsik;Lee, Jaedo;Cha, Hanju
    • The Transactions of the Korean Institute of Power Electronics
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    • v.19 no.1
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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.

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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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.

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

  • Choi, Jung-Wan;Cha, Han-Ju
    • The Transactions of the Korean Institute of Power Electronics
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    • v.14 no.6
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    • pp.496-503
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    • 2009
  • In this paper, a new three-phase interleaved isolated high efficiency boost dc-dc converter with active clamp is proposed. The converter is capable of increased power transfer due to its three-phase power configuration, and it reduces the rms current per phase, thus reducing conduction losses. Further, interleaved operation of three-phase boost converter reduces overall ripple current, which is imposed into fuel cells and realizes smaller sized filter components, increasing effective operating frequency and leading to higher power density. Each output current of three-phase boost converter is combined by the three-phase transformer and flows in the continuous conduction mode by the proposed three-phase PWM strategy. An efficiency of above 96% is mainly achieved by reducing conduction losses and switching losses are reduced by the action of active clamp branches, as well. The proposed converter and three-phase PWM strategy are analyzed, simulated and implemented in hardware. Experimental results are obtained on a 500 W prototype unit, with all of the design verified and analyzed.

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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    • v.11 no.4
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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.

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

  • Jung, Jae-Hun;Kim, Jihyun;Nho, Eui-Cheol;Kim, Heung-Geun;Chun, Tae-Won
    • The Transactions of the Korean Institute of Power Electronics
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    • v.21 no.3
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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.