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http://dx.doi.org/10.3795/KSME-A.2015.39.1.079

Electro-Mechanical Modeling and Performance Analysis of Floating Wave Energy Converters Utilizing Yo-Yo Vibrating System  

Sim, Kyuho (Dept. of Mechanical System Design Engineering, Seoul Nat'l Univ. of Sci. & Tech.)
Park, Jisu (Dept. of Mechanical System Design Engineering, Seoul Nat'l Univ. of Sci. & Tech.)
Jang, Seon-Jun (Innovation KR)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.39, no.1, 2015 , pp. 79-87 More about this Journal
Abstract
This paper proposes a floating-type wave energy conversion system that consists of a mechanical part (yo-yo vibrating system, motion rectifying system, and power transmission system) and electrical part (power generation system). The yo-yo vibrating system, which converts translational input to rotational motion, is modeled as a single degree-of-freedom system. It can amplify the wave input via the resonance phenomenon and enhance the energy conversion efficiency. The electromechanical model is established from impedance matching of the mechanical part to the electrical system. The performance was analyzed at various wave frequencies and damping ratios for a wave input acceleration of 0.14 g. The maximum output occurred at the resonance frequency and optimal load resistance, where the power conversion efficiency and electrical output power reached 48% and 290 W, respectively. Utilizing the resonance phenomenon was found to greatly enhance the performance of the wave energy converter, and there exists a maximum power point at the optimum load resistance.
Keywords
Yo-Yo Vibrating System; Energy Harvester; Wave Energy Converter; Impedance Matching; Resonance; Electromechanical System;
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Times Cited By KSCI : 2  (Citation Analysis)
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