Design and Experiment of an Indirect Wave Power Generation Device using Magnetic Lead Screw

Zhao, Aqiang; Wu, Weimin; Zhu, Lixun; Chen, Hao; Lu, Kaiyuan; Blaabjerg, Frede

doi:10.1109/iecon.2019.8927287

Cited by 4 publications

(1 citation statement)

References 12 publications

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“…However, due to the mechanical wear of and regular maintenance required for the mechanical screw, it cannot adapt to complex ocean wave conditions. Inspiration can be drawn from the mechanical screw, and the magnetic lead screw (MLS) has been proposed as a device that maintains the capacity for transferring low-linear motion to high-rotational motion [18][19][20]. In addition, the MLS has the advantages of being maintenance-free and possessing overload protection, a simple structure, low vibration, and a higher thrust density than traditional linear PM generators [21][22][23].…”

Section: Gearboxmentioning

confidence: 99%

Comparison and Optimization of a Magnetic Lead Screw Applied in Wave Energy Conversions

Xia

Zhang

et al. 2022

Electronics

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In order to improve the power density of the wave power generation system, a magnetic lead screw (MLS) is introduced in this paper as a speed-increasing device in a wave energy converter (WEC), which converts low-speed linear wave motion to high-speed rotational motion. Then, several types of MLSs with different topologies, which were optimized, are described. Finite element analysis (FEA) was used to investigate and evaluate their electromagnetic performances, such as the thrust force, torque, air gap magnetic density, etc. The optimized MLS prototype was manufactured, and the measurements verify the FEA results. Finally, a magnetic lead screw hybrid generator (MLSHG) for application to the WEC is proposed. This MLS significantly improved the power density under different wave conditions. When the moving speed v = 0.15 m/s, the output power of the MLSHG and outer-PM linear tubular generator were 923 W and 87 W, respectively, when the load resistance was 5 Ω. The output power of the MLSHG was more than 10 times compared to that of the outer-PM linear tubular generator in a fair comparison. Here, it is shown that the power density and output power of were MLSHG increased greatly.

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