Analysis of High-Efficiency Field Modulated Multi-Phase Linear Generator for Wave Power Generation

With the energy shortage and environmental problems becoming increasingly prominent, wave energy as a clean energy has become a hot research spot for scholars around the world. However, wave energy generators have problems such as low power density, low conversion efficiency and large fluctuation of detent force. To address these problems, a novel high-efficiency field modulated multi-phase linear generator (HFMMLG) for wave energy generation is proposed in this paper. Different from traditional three-phase field modulated linear generator (TTFMLG), double-side five-phase structure is adopted by HFMMLG, secondary mover integrates the magnetic adjusting ring(MAR) with the secondary armature. The topology of this new HFMMLG based on the magnetic field modulation theory is designed by this paper. The finite element model of HFMMLG and TTFMLG are established, and comparatively analyzes its power density, conversion efficiency and detent force. It is results show that the new HFMMLG designed in this paper improves the output power by 5.6 compared with TTFMLG, and the generator has smaller detent force. Therefore, the novel generator designed in this paper can greatly improve the generator power density and conversion efficiency, improve the stability of the generator and provides new ideas for the development of new wave energy linear generator.