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Research on Variable Speed Variable Displacement Power Unit with High Efficiency and High Dynamic Optimized Matching

Author

Listed:
  • Mingkun Yang

    (School of Mechanical Engineering, Yanshan University, Qinhuangdao 066004, China)

  • Xianhang Liu

    (School of Mechanical Engineering, Yanshan University, Qinhuangdao 066004, China)

  • Guishan Yan

    (School of Intelligent Systems Engineering, Sun Yat-Sen University, Guangzhou 510275, China)

  • Chao Ai

    (School of Mechanical Engineering, Yanshan University, Qinhuangdao 066004, China)

  • Cong Yu

    (School of Mechanical Engineering, Yanshan University, Qinhuangdao 066004, China)

Abstract

For the variable speed variable displacement power unit (VSVDPU), achieving power matching between the permanent magnet synchronous motor (PMSM) and the variable displacement plunger pump (VDPP) is the key to reducing system energy consumption. The control method of adjusting the speed of the PMSM and the displacement of the VDPP is the mainstay of current research and application of the VSVDPU. However, the dynamic properties of the PMSM and VDPP have not been balanced, which affects the control effect of the VSVDPU. This paper proposes a control method of variable speed and variable displacement with low energy consumption and high dynamics. The main idea is based on the efficiency model and dynamic response model of the PMSM and VDPP, and the factors that affect the efficiency and dynamic characteristics of the VSVDPU are analyzed. Guided by the multi-objective optimization algorithm, the optimal combination of speed and displacement under specific working conditions is derived. Simulation and experiment results show that the proposed control method is feasible to improve the efficiency and dynamic characteristics of the VSVDPU.

Suggested Citation

  • Mingkun Yang & Xianhang Liu & Guishan Yan & Chao Ai & Cong Yu, 2024. "Research on Variable Speed Variable Displacement Power Unit with High Efficiency and High Dynamic Optimized Matching," Energies, MDPI, vol. 17(13), pages 1-22, July.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:13:p:3322-:d:1430195
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    References listed on IDEAS

    as
    1. Quan, Zhongyi & Quan, Long & Zhang, Jinman, 2014. "Review of energy efficient direct pump controlled cylinder electro-hydraulic technology," Renewable and Sustainable Energy Reviews, Elsevier, vol. 35(C), pages 336-346.
    2. Zheng Yan & Lei Ge & Long Quan, 2022. "Energy-Efficient Electro-Hydraulic Power Source Driven by Variable-Speed Motor," Energies, MDPI, vol. 15(13), pages 1-19, June.
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