Magnetic field‐modulated linear permanent‐magnet generator for direct‐drive wave energy conversion

Feng, Ningjun; Yu, Haitao; Zhao, Mei; Zhang, Ping; Hou, Dianli

doi:10.1049/iet-epa.2019.0483

Cited by 12 publications

(6 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Refine design parameters for permanent magnet shape modification of … (Noor Syazana Abd Ghani) 137 increases, as supported by the findings of [23]- [25]. The findings demonstrated that the back-EMF reached the induced voltage produced to have the output power at the pico-scale.…”

Section: Influence Of Split Ratio 𝑹𝒎/𝑹𝒆mentioning

confidence: 59%

“…𝐿 𝑠 /𝐿 𝑟 influenced the magnetic flux that passed through the coil and was correlated with the voltage induced by the coil. The leading parameter of 𝜏 𝑚𝑟 /𝜏 𝑝 ratio reflected the combined effects of radially and axially magnetized magnets to achieve a maximum fundamental radial flux density in the air gap [23]- [26]. The dimension sizes of all the permanent magnet designs were different due to the different shapes of the permanent magnets used during the designing process.…”

Section: Refine Design Parametermentioning

confidence: 99%

See 1 more Smart Citation

Refine design parameters for permanent magnet shape modification of the direct-drive generator

Ghani

Ibrahim

Nor

2022

IJPEDS

View full text Add to dashboard Cite

The high cost associated with operation has promoted the progress of wave energy conversion and has higher power output and larger size. However, many countries are bordered by the sea, and the possible area for using wave energy is very small which can generate peak power generation systems with a power output of less than 100 W. The purpose of this article is to introduce the refined parameters of new design of the permanent magnet shape of with tubular longitudinal direct-drive generator. Three designs proposed, which different shapes of permanent magnets with same topology. The parameter optimization process was analysed using finite element analysis to determine the best main parameters of the design, namely the length of the stator length to translation ratio (𝐿𝑠/𝐿𝑟), pitch ratio (𝜏𝑚𝑟/𝜏𝑝.), and split ratio (𝑅𝑚/𝑅𝑒). To evaluate design performance, electrical losses from the proposed design were also evaluated. The optimization results show these designs generator can produce 100 W of peak level output power with higher efficiency at rated current and optimal load.

show abstract

Section: Influence Of Split Ratio 𝑹𝒎/𝑹𝒆mentioning

confidence: 59%

Section: Refine Design Parametermentioning

confidence: 99%

Refine design parameters for permanent magnet shape modification of the direct-drive generator

Ghani

Ibrahim

Nor

2022

IJPEDS

View full text Add to dashboard Cite

show abstract

“…Moreover, the generator performances have been analysed in no-load and load conditions and for single-phase and 3-phase [93]. Moreover, the simulations have been performed for the no-load and load condition [177].…”

Section: Numerical Analysismentioning

confidence: 99%

A Review of the Linear Generator Type of Wave Energy Converters’ Power Take-Off Systems

2022

View full text Add to dashboard Cite

The traditional wave energy converters (WECs) use hydraulic or turbine-type power take-off (PTO) mechanisms which consist of many moving parts, creating mechanical complexity and increasing the installation and maintenance costs. Linear generator-based direct-drive WECs could be a solution to overcome this problem, but the efficiency of the single conventional linear generator is not high enough, and it cannot work satisfactorily in the low-frequency range. This article reviews the recent research developments of the linear permanent magnet (PM) generator-based WEC to harness maximum energy from ocean waves. It starts with a brief introduction and background of wave energy converters using linear generators. Following this, the working principle of the WECs with linear PM generators is briefly outlined. Subsequently, the analytical model of the linear PM generator-based WEC is studied. After that, the up-to-date developments of the linear PM generator-based PTO systems are studied. Despite some modifications resulting in complexity in the linear PM generator’s structure and a rise in manufacturing costs, the study shows the systems’ efficiencies increased by increasing magnetic flux and reducing cogging force. The key parameters and improvement issues that can increase the performances and efficiencies of the PTO systems are identified to help future researchers for further development. Moreover, the review discusses the numerical and experimental analysis tools, the typical control systems used by the researchers and the challenges of the linear generator-based wave energy conversion system. Finally, conclusions about the significant beneficial characteristics and design choice of the WEC linear generator structure are provided and related to the application conditions.

show abstract

“…In addition, in order to adapt the ocean environment of D-DWEC system, refs. [74,75] have studied two types of linear generators with integrated magnetic gear respectively, and the purpose is to have simple structure, simple processing, high reliability and low cost.…”

Section: Linear Magnetic Gearmentioning

confidence: 99%

Direct‐Drive wave energy conversion with linear generator: A review of research status and challenges

Zhang

Chen

2022

IET Renewable Power Gen

Self Cite

View full text Add to dashboard Cite

Ocean wave energy is sustainable and renewable energy, wave energy conversion (WEC) effectively solves the disadvantage of traditional power system with fossil energy. WEC system is the power generation process that converts wave kinetic energy of undulation and swing into electric energy, and direct-drive WEC system (D-DWEC) converts wave energy into electric power directly by linear generator to improve the efficiency. At present, the research of WEC system has the characteristic of interdisciplinary, multi-system integration, engineering application, and commercial operation. This paper summarizes the types, principle, and classification of WEC system, mainly focusing on the aspects of the kinds and characteristics of linear generators used in D-DWEC system, power post-processing, and power control methods. At the end of the paper, giving the development trend and challenges of D-DWEC technology, the research of ocean complementary energy generation platform with offshore wind, solar and ocean wave energy is analysed. It shows that the platform has advantages owing to stable power output, efficient utilization, ocean saving-space, and power generation cost reduction.

show abstract

Magnetic field‐modulated linear permanent‐magnet generator for direct‐drive wave energy conversion

Cited by 12 publications

References 29 publications

Refine design parameters for permanent magnet shape modification of the direct-drive generator

Refine design parameters for permanent magnet shape modification of the direct-drive generator

A Review of the Linear Generator Type of Wave Energy Converters’ Power Take-Off Systems

Direct‐Drive wave energy conversion with linear generator: A review of research status and challenges

Contact Info

Product

Resources

About