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Isolated DC-DC Converter for Bidirectional Power Flow Controlling with Soft-Switching Feature and High Step-Up/Down Voltage Conversion

Author

Listed:
  • Chih-Lung Shen

    (Department of Electronic Engineering, National Kaohsiung First University of Science and Technology, Kaohsiung 82445, Taiwan)

  • You-Sheng Shen

    (Department of Electronic Engineering, National Kaohsiung First University of Science and Technology, Kaohsiung 82445, Taiwan)

  • Cheng-Tao Tsai

    (Department of Electrical Engineering, National Chin-Yi University of Technology, Taichung 41170, Taiwan)

Abstract

In this paper, a novel isolated bidirectional DC-DC converter is proposed, which is able to accomplish high step-up/down voltage conversion. Therefore, it is suitable for hybrid electric vehicle, fuel cell vehicle, energy backup system, and grid-system applications. The proposed converter incorporates a coupled inductor to behave forward-and-flyback energy conversion for high voltage ratio and provide galvanic isolation. The energy stored in the leakage inductor of the coupled inductor can be recycled without the use of additional snubber mechanism or clamped circuit. No matter in step-up or step-down mode, all power switches can operate with soft switching. Moreover, there is a inherit feature that metal–oxide–semiconductor field-effect transistors (MOSFETs) with smaller on-state resistance can be adopted because of lower voltage endurance at primary side. Operation principle, voltage ratio derivation, and inductor design are thoroughly described in this paper. In addition, a 1-kW prototype is implemented to validate the feasibility and correctness of the converter. Experimental results indicate that the peak efficiencies in step-up and step-down modes can be up to 95.4% and 93.6%, respectively.

Suggested Citation

  • Chih-Lung Shen & You-Sheng Shen & Cheng-Tao Tsai, 2017. "Isolated DC-DC Converter for Bidirectional Power Flow Controlling with Soft-Switching Feature and High Step-Up/Down Voltage Conversion," Energies, MDPI, vol. 10(3), pages 1-23, March.
    • Handle: RePEc:gam:jeners:v:10:y:2017:i:3:p:296-:d:91986
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    References listed on IDEAS

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    1. Jiuchun Jiang & Yan Bao & Le Yi Wang, 2014. "Topology of a Bidirectional Converter for Energy Interaction between Electric Vehicles and the Grid," Energies, MDPI, vol. 7(8), pages 1-37, July.
    2. Ching-Ming Lai, 2016. "Development of a Novel Bidirectional DC/DC Converter Topology with High Voltage Conversion Ratio for Electric Vehicles and DC-Microgrids," Energies, MDPI, vol. 9(6), pages 1-25, May.
    3. Kou-Bin Liu & Chen-Yao Liu & Yi-Hua Liu & Yuan-Chen Chien & Bao-Sheng Wang & Yong-Seng Wong, 2016. "Analysis and Controller Design of a Universal Bidirectional DC-DC Converter," Energies, MDPI, vol. 9(7), pages 1-23, June.
    4. Li-Kun Xue & Ping Wang & Yi-Feng Wang & Tai-Zhou Bei & Hai-Yun Yan, 2015. "A Four-Phase High Voltage Conversion Ratio Bidirectional DC-DC Converter for Battery Applications," Energies, MDPI, vol. 8(7), pages 1-28, June.
    5. Rita Pinto & Sílvio Mariano & Maria Do Rosário Calado & José Felippe De Souza, 2016. "Impact of Rural Grid-Connected Photovoltaic Generation Systems on Power Quality," Energies, MDPI, vol. 9(9), pages 1-15, September.
    6. Chih-Lung Shen & Po-Chieh Chiu & Yan-Chi Lee, 2016. "Novel Interleaved Converter with Extra-High Voltage Gain to Process Low-Voltage Renewable-Energy Generation," Energies, MDPI, vol. 9(11), pages 1-12, October.
    7. Mohamed A. Elsaharty & Hamdy A. Ashour & Elyas Rakhshani & Edris Pouresmaeil & João P. S. Catalão, 2016. "A Novel DC-Bus Sensor-less MPPT Technique for Single-Stage PV Grid-Connected Inverters," Energies, MDPI, vol. 9(4), pages 1-23, March.
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    Cited by:

    1. Chien-Chun Huang & Tsung-Lin Tsai & Yao-Ching Hsieh & Huang-Jen Chiu, 2018. "A Bilateral Zero-Voltage Switching Bidirectional DC-DC Converter with Low Switching Noise," Energies, MDPI, vol. 11(10), pages 1-18, October.
    2. Hailong Zhang & Yafei Chen & Sung-Jun Park & Dong-Hee Kim, 2019. "A Family of Bidirectional DC–DC Converters for Battery Storage System with High Voltage Gain," Energies, MDPI, vol. 12(7), pages 1-19, April.
    3. Yiwang Wang & Chun Gan & Kai Ni & Xinhua Li & Houjun Tang & Yong Yang, 2017. "A Multifunctional Isolated and Non-Isolated Dual Mode Converter for Renewable Energy Conversion Applications," Energies, MDPI, vol. 10(12), pages 1-17, November.

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