Design and analysis of a novel PM linear generator with improved voltage quality for wave energy conversion

A new permanent magnet linear generator (PMLG) for oscillating buoy wave energy converter (WEC) is proposed in this paper. Compared to traditional machines, this generator focuses on e enhancing the waveform and amplitude of the output voltage of wave energy generators. A detailed explanation of the operating principle, magnetic flux distribution, no-load characteristics, and load characteristics of the generator through analytical modeling and finite element analysis is provided. In the parametric analysis, the effects of different parameters on the no-load electromotive force are calculated to determine the optimal setting parameters. The simulation results demonstrate a significant improvement in the output voltage quality, expanding the effective operating range of the oscillating buoy-based power generation system and enhancing its efficiency. Moreover, by optimizing the input voltage, the design requirements for subsequent power conversion stages can be relaxed.