A study of a speed amplified linear generator for low-frequency wave energy conversion

Liu, Zhenwei; Wang, Xu; Shami, Elie Al; Baker, Nick; Ji, Xueyu

doi:10.1016/j.ymssp.2020.107226

Cited by 26 publications

(5 citation statements)

References 30 publications

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“…With the rapid development of the energy crisis and environmental problems, the utilization of renewable energies has attracted a great deal of attention around the world 1 . Among these energies, ocean wave energy has a higher energy density and is more predictable than others such as wind and solar energies 2–5 . Furthermore, rapidly developed seawater or ocean energy has been considered a strategic source of renewable energy which is one of the cleanest sources that can be used for electrical energy generation 6,7 .…”

Section: Introductionsupporting

confidence: 91%

“…1 Among these energies, ocean wave energy has a higher energy density and is more predictable than others such as wind and solar energies. [2][3][4][5] Furthermore, rapidly developed seawater or ocean energy has been considered a strategic source of renewable energy which is one of the cleanest sources that can be used for electrical energy generation. 6,7 The growing demand for energy and the need to exploit renewable energy sources (RESs) have necessitated the study of energy converter systems.…”

Section: Introductionmentioning

confidence: 99%

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Design and optimization of air‐cored double‐sided linear permanent magnet generators for wave energy conversion

Niknafs

Shiri

Bagheri

2022

Energy Science & Engineering

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Recently, linear generators have been widely employed to convert oceanic wave energy into electricity. Among various linear generators, linear permanent magnet generators (LPMGs) have gained attention due to their special characteristics such as high power density and simple control structure. In this paper, flat double-sided LPMG is investigated and designed.Considering all effective design variables, a particle swarm optimization algorithm-based optimization method is employed to maximize efficiency and minimize weight. The optimization results show an increase in efficiency and a reduction in the weight of the generator. Finally, the design results are evaluated and validated using magnetic equivalent circuit and finite element analysis methods.

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Section: Introductionsupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Design and optimization of air‐cored double‐sided linear permanent magnet generators for wave energy conversion

Niknafs

Shiri

Bagheri

2022

Energy Science & Engineering

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“…11–15 Thus, a combination of them can be complementary in the characteristics of power generation. 16–19 Moreover, the differences in the structural design and spatial arrangement between TENG and EMG provide an assurance of the integrated assembly of their compound systems. METHEC has many advantages over a single TENG or EMG because it makes full use of the facility space by adding TENG without increasing the volume of EMG.…”

Section: Introductionmentioning

confidence: 99%

Design and optimization of a maglev electromagnetic–triboelectric hybrid energy converter for supplying power to intelligent sensing equipment

Kong

Yin

Sun

et al. 2022

Sustainable Energy Fuels

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“…Relevant research on damping is available in some published literature on PMLGbased WECs. In light of [14], Liu studied both electrical damping and mechanical damping on a buoy's behavior. In [15], Wang proposed the optimal load estimation based on the electromagnetic force by power-take-off (PTO) damping.…”

Section: Introductionmentioning

confidence: 99%

Damping Studies on PMLG-Based Wave Energy Converter under Oceanic Wave Climates

et al. 2021

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Wave energy converters (WECs), which are designed to harvest ocean wave energy, have recently been improved by the installation of numerous conversion mechanisms; however, it is still difficult to find an appropriate method that can compromise between strong environmental impact and robust performance by transforming irregular wave energy into stable electrical power. To solve this problem, an investigation into the impact of varied wave conditions on the dynamics of WECs and to determine an optimal factor for WECs to comply with long-term impacts was performed. In this work, we researched the performance of WECs influenced by wave climates. We used a permanent magnet linear generator (PMLG)-based WEC that was invented at Uppsala University. The damping effect was first studied with a PMLG-type WEC. Then, a group of sea states was selected to investigate their impact on the power production of the WEC. Two research sites were chosen to investigate the WEC’s annual energy production as well as a study on the optimal damping coefficient impact. In addition, we compared the WEC’s energy production between optimal damping and constant damping under a full range of sea states at both sites. Our results show that there is an optimal damping coefficient that can achieve the WEC’s maximum power output. For the chosen research sites, only a few optimal damping coefficients were able to contribute over 90% of the WEC’s annual energy production. In light of the comparison between optimal and constant damping, we conclude that, for specific regions, constant damping might be a better choice for WECs to optimize long-term energy production.

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A study of a speed amplified linear generator for low-frequency wave energy conversion

Cited by 26 publications

References 30 publications

Design and optimization of air‐cored double‐sided linear permanent magnet generators for wave energy conversion

Design and optimization of air‐cored double‐sided linear permanent magnet generators for wave energy conversion

Design and optimization of a maglev electromagnetic–triboelectric hybrid energy converter for supplying power to intelligent sensing equipment

Damping Studies on PMLG-Based Wave Energy Converter under Oceanic Wave Climates

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