Design and Simulation Analysis of a New Cylindrical Permanent Magnet Linear Motor for Vortex-Induced Vibration Ocean Current Power Generation

Aiming at the disadvantages of rotating generators' low electrical energy conversion efficiency and poor system stability in eddy vibration sea current energy generation systems, this paper proposes a radially magnetized cylindrical permanent magnet linear generator, which simplifies the intermediate transmission device and improves the stability of system operation. The Ansys program was used to investigate the relationship between the magnetization technique, pole arc coefficient, permanent magnet thickness, back iron thickness, and the linear motor. The air gap magnetic density and no-load-induced electric potential waveform curves were also provided. The results demonstrate that the maximum generating power can be reached by analyzing the load characteristics when the polar arc coefficient is 0.75, the amplitude of the no-load induced electromotive force generated by the radial magnetization drum permanent magnet linear motor is the largest, and the waveform sinusoidal is the best.