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Hybrid System Modeling and Full Cycle Operation Analysis of a Two-Stroke Free-Piston Linear Generator

Author

Listed:
  • Peng Sun

    (Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, Zhejiang Key Laboratory of Robotics and Intelligent Manufacturing Equipment Technology, Ningbo 315201, China
    University of Chinese Academy of Sciences, Beijing 100049, China)

  • Chi Zhang

    (University of Chinese Academy of Sciences, Beijing 100049, China)

  • Jinhua Chen

    (Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, Zhejiang Key Laboratory of Robotics and Intelligent Manufacturing Equipment Technology, Ningbo 315201, China)

  • Fei Zhao

    (Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, Zhejiang Key Laboratory of Robotics and Intelligent Manufacturing Equipment Technology, Ningbo 315201, China)

  • Youyong Liao

    (Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, Zhejiang Key Laboratory of Robotics and Intelligent Manufacturing Equipment Technology, Ningbo 315201, China)

  • Guilin Yang

    (Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, Zhejiang Key Laboratory of Robotics and Intelligent Manufacturing Equipment Technology, Ningbo 315201, China)

  • Chinyin Chen

    (Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, Zhejiang Key Laboratory of Robotics and Intelligent Manufacturing Equipment Technology, Ningbo 315201, China)

Abstract

Free-piston linear generators (FPLGs) have attractive application prospects for hybrid electric vehicles (HEVs) owing to their high-efficiency, low-emissions and multi-fuel flexibility. In order to achieve long-term stable operation, the hybrid system design and full-cycle operation strategy are essential factors that should be considered. A 25 kW FPLG consisting of an internal combustion engine (ICE), a linear electric machine (LEM) and a gas spring (GS) is designed. To improve the power density and generating efficiency, the LEM is assembled with two modular flat-type double-sided PM LEM units, which sandwich a common moving-magnet plate supported by a middle keel beam and bilateral slide guide rails to enhance the stiffness of the moving plate. For the convenience of operation processes analysis, the coupling hybrid system is modeled mathematically and a full cycle simulation model is established. Top-level systemic control strategies including the starting, stable operating, fault recovering and stopping strategies are analyzed and discussed. The analysis results validate that the system can run stably and robustly with the proposed full cycle operation strategy. The effective electric output power can reach 26.36 kW with an overall system efficiency of 36.32%.

Suggested Citation

  • Peng Sun & Chi Zhang & Jinhua Chen & Fei Zhao & Youyong Liao & Guilin Yang & Chinyin Chen, 2017. "Hybrid System Modeling and Full Cycle Operation Analysis of a Two-Stroke Free-Piston Linear Generator," Energies, MDPI, vol. 10(2), pages 1-23, February.
    • Handle: RePEc:gam:jeners:v:10:y:2017:i:2:p:213-:d:90230
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    References listed on IDEAS

    as
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    Cited by:

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    2. Hou, Xiaochen & Zhang, Hongguang & Xu, Yonghong & Yu, Fei & Zhao, Tenglong & Tian, Yaming & Yang, Yuxin & Zhao, Rui, 2018. "External load resistance effect on the free piston expander-linear generator for organic Rankine cycle waste heat recovery system," Applied Energy, Elsevier, vol. 212(C), pages 1252-1261.
    3. Xuezhen Wang & Feixue Chen & Renfeng Zhu & Guilin Yang & Chi Zhang, 2018. "A Review of the Design and Control of Free-Piston Linear Generator," Energies, MDPI, vol. 11(8), pages 1-21, August.
    4. Li, Jian & Zuo, Zhengxing & Liu, Wenzhen & Jia, Boru & Feng, Huihua & Wang, Wei & Smallbone, Andrew & Roskilly, Anthony Paul, 2023. "Generating performance of a tubular permanent magnet linear generator for application on free-piston engine generator prototype with wide-ranging operating parameters," Energy, Elsevier, vol. 278(C).
    5. Guo, Chendong & Zuo, Zhengxing & Feng, Huihua & Jia, Boru & Roskilly, Tony, 2020. "Review of recent advances of free-piston internal combustion engine linear generator," Applied Energy, Elsevier, vol. 269(C).
    6. Chi Zhang & Feixue Chen & Long Li & Zhaoping Xu & Liang Liu & Guilin Yang & Hongyuan Lian & Yingzhong Tian, 2018. "A Free-Piston Linear Generator Control Strategy for Improving Output Power," Energies, MDPI, vol. 11(1), pages 1-21, January.

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