Structural Optimization and Electromagnetic Performance Research of Axial Magnetic Field Tidal Current Generators

Wenzhou Liu, Jinghuan Yang, Lixin Pei (), Mohammad Rafiei, Yilong Yang, Yuliang Wang, Jiacheng Cui, Yun Guo and Baowen Zhang
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Wenzhou Liu: School of Electrical and Information Engineering, Changchun University of Architecture and Civil Engineering, Changchun 130607, China
Jinghuan Yang: Changchun Institute of Technology, Changchun 130012, China
Lixin Pei: Changchun Institute of Technology, Changchun 130012, China
Mohammad Rafiei: Italian National Research Council Institute of Marine Engineering, 00128 Rome, Italy
Yilong Yang: Changchun Institute of Technology, Changchun 130012, China
Yuliang Wang: Changchun Institute of Technology, Changchun 130012, China
Jiacheng Cui: Changchun Institute of Technology, Changchun 130012, China
Yun Guo: Changchun Institute of Technology, Changchun 130012, China
Baowen Zhang: Changchun Kunpeng Energy Saving and Environmental Protection Technology Co., Changchun 130200, China

Energies, 2025, vol. 18, issue 10, 1-17

Abstract: Tidal energy, as a stable and predictable renewable energy source, is garnering increasing attention. However, tidal energy generation faces challenges such as low energy conversion efficiency and high mechanical losses in low-velocity environments. To address these issues, this paper proposes a novel design for a tidal energy generator based on an axial field coreless structure. This design significantly reduces mechanical losses and enhances energy conversion efficiency by employing a direct-drive structure and a coreless stator. Additionally, the introduction of a Halbach array permanent magnet and soft magnetic composite further optimizes the generator’s electromagnetic performance, thereby increasing power output. Simulation results demonstrate that the designed generator can achieve a power output of 300 W at a tidal velocity of 1.8 m/s, with an average generation efficiency of 90.6%. This design exhibits excellent performance in low-velocity tidal environments and provides valuable technical support for the design of tidal energy generators.

Keywords: low-velocity tidal energy generation; axial field coreless generator; Halbach array permanent magnet; soft magnetic composite; direct-drive structure; electromagnetic performance optimization (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
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