Converting persistent and renewable wave energy into electricity has been studied in recent years. This research develops a novel fully floating three-body direct-drive wave energy converter (DD-WEC) prepared for the research of the multi-body DD-WEC. Its prototype consists of three floating bodies, but both three bodies act as buoys to extract the wave energy, not just a body. And the relative motion of the buoys induces the voltage in Halbach array permanent magnet linear generators coils. Its feasibility is investigated theoretically by analyzing the dynamics of motion of the floating buoys. As a result, parametric design of the WEC is achieved. The load performance of the DD-WEC is investigated by using the Simulink, and it can be found that the relative displacements between buoys are different. Then, the electromagnetic power of the proposed WEC is much higher compared to a two-body DD-WEC by using numerical simulation Finally, the DD-WEC prototype is manufactured and tested in the wave tank. The results show that the WEC can produce the most electricity for the case with the wave period of 1.6 s, and the maximum voltage reaches 14.2 V, which is consistent with the simulation results. The results show that the proposed DD-WEC is well suited for wave energy conversion.

中文翻译：

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用于直接驱动波能转换器的新型全浮式三体系统

近年来，已经研究了将持久的可再生波浪能转换为电能的方法。这项研究开发了一种新颖的全浮式三体直接驱动波能量转换器（DD-WEC），该转换器用于研究多体DD-WEC。它的原型包含三个浮体，但三个体都充当浮标以提取波浪能，而不仅仅是一个体。浮标的相对运动会在Halbach阵列永磁线性发电机线圈中感应出电压。通过分析浮标运动的动力学，从理论上研究了其可行性。结果，实现了WEC的参数设计。使用Simulink对DD-WEC的载荷性能进行了研究，发现浮标之间的相对位移是不同的。然后，通过数值模拟，提出的WEC的电磁功率比两主体DD-WEC高得多。最后，在波箱中制造并测试了DD-WEC原型。结果表明，在周期为1.6 s的情况下，WEC可以产生最大的电能，最大电压达到14.2 V，与仿真结果相符。结果表明，提出的DD-WEC非常适合波能转换。