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Design and Experiment Analysis of a Direct-Drive Wave Energy Converter with a Linear Generator

Author

Listed:
  • Jing Zhang

    (School of Electrical Engineering, Southeast University, Nanjing 210096, China
    Department of Electrical Engineering, Jinling Institute of Technology, Nanjing 211169, China)

  • Haitao Yu

    (School of Electrical Engineering, Southeast University, Nanjing 210096, China)

  • Zhenchuan Shi

    (School of Electrical Engineering, Southeast University, Nanjing 210096, China)

Abstract

Coastal waves are an abundant nonpolluting and renewable energy source. A wave energy converter (WEC) must be designed for efficient and steady operation in highly energetic ocean environments. A direct-drive wave energy conversion (D-DWEC) system with a tubular permanent magnet linear generator (TPMLG) on a wind and solar photovoltaic complementary energy generation platform is proposed to improve the conversion efficiency and reduce the complexity and device volume of WECs. The operating principle of D-DWECs is introduced, and detailed analyses of the proposed D-DWEC’s floater system, wave force characteristics, and conversion efficiency conducted using computational fluid dynamics are presented. A TPMLG with an asymmetric slot structure is designed to increase the output electric power, and detailed analyses of the magnetic field distribution, detent force characteristics, and no-load and load performances conducted using finite element analysis are discussed. The TPMLG with an asymmetric slot, which produces the same power as the TPMLG with a symmetric slot, has one fifth detent force of the latter. An experiment system with a prototype of the TPMLG with a symmetric slot is used to test the simulation results. The experiment and analysis results agree well. Therefore, the proposed D-DWEC fulfills the requirements of WEC systems.

Suggested Citation

  • Jing Zhang & Haitao Yu & Zhenchuan Shi, 2018. "Design and Experiment Analysis of a Direct-Drive Wave Energy Converter with a Linear Generator," Energies, MDPI, vol. 11(4), pages 1-15, March.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:4:p:735-:d:137798
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    References listed on IDEAS

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    1. Gao, Yuping & Shao, Shuangquan & Zou, Huiming & Tang, Mingsheng & Xu, Hongbo & Tian, Changqing, 2016. "A fully floating system for a wave energy converter with direct-driven linear generator," Energy, Elsevier, vol. 95(C), pages 99-109.
    2. Ekström, Rickard & Ekergård, Boel & Leijon, Mats, 2015. "Electrical damping of linear generators for wave energy converters—A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 42(C), pages 116-128.
    3. Ningjun Feng & Haitao Yu & Minqiang Hu & Chunyuan Liu & Lei Huang & Zhenchuan Shi, 2016. "A Study on a Linear Magnetic-Geared Interior Permanent Magnet Generator for Direct-Drive Wave Energy Conversion," Energies, MDPI, vol. 9(7), pages 1-12, June.
    4. Ahn, K.K. & Truong, D.Q. & Tien, Hoang Huu & Yoon, Jong Il, 2012. "An innovative design of wave energy converter," Renewable Energy, Elsevier, vol. 42(C), pages 186-194.
    5. Ozkop, Emre & Altas, Ismail H., 2017. "Control, power and electrical components in wave energy conversion systems: A review of the technologies," Renewable and Sustainable Energy Reviews, Elsevier, vol. 67(C), pages 106-115.
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    Cited by:

    1. Raju Ahamed & Kristoffer McKee & Ian Howard, 2022. "A Review of the Linear Generator Type of Wave Energy Converters’ Power Take-Off Systems," Sustainability, MDPI, vol. 14(16), pages 1-42, August.
    2. Rui Mendes & Maria Do Rosário Calado & Sílvio Mariano, 2018. "Maximum Power Point Tracking for a Point Absorber Device with a Tubular Linear Switched Reluctance Generator," Energies, MDPI, vol. 11(9), pages 1-18, August.
    3. Hong-wei Fang & Ru-nan Song & Zhao-xia Xiao, 2018. "Optimal Design of Permanent Magnet Linear Generator and Its Application in a Wave Energy Conversion System," Energies, MDPI, vol. 11(11), pages 1-12, November.
    4. Naily Akmal Mohd Zamri & Taib Ibrahim & Nursyarizal Mohd Nor, 2020. "Design and Analysis of Tubular Slotted Linear Generators for Direct Drive Wave Energy Conversion Systems," Energies, MDPI, vol. 13(23), pages 1-26, November.
    5. Chun-Yu Hsiao & Chin-Hsiang Lai & Zhu-Xuan Zheng & Guan-Yu Li, 2021. "Design and Implement of Three-Phase Permanent-Magnet Synchronous Wave Generator using Taguchi Approach," Energies, MDPI, vol. 14(7), pages 1-17, April.

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