Optimal Design of Permanent Magnet Linear Generator and Its Application in a Wave Energy Conversion System

Fang, Hongwei; Song, Runan; Xiao, Zhaoxia

doi:10.3390/en11113109

Cited by 13 publications

(4 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…An optimised linear PM generator design for wave energy conversion has been proposed using the level-set method to increase the energy-capturing efficiency from ocean waves [114]. It is known that the unbalanced back EMFs and the distortion of air gap flux density influence the performance and stability of the linear PM generator.…”

Section: Design Optimisation To Maximize the Performancementioning

confidence: 99%

See 1 more Smart Citation

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

Section: Design Optimisation To Maximize the Performancementioning

confidence: 99%

“…Simulation [5,17,34,35,50,55,59,77,84,111,114,120,[150][151][152][153][154][155][156][157][158][159][160] Experiment Ocean test [9,65,91,104,161,162] Wave tank test [163] Test rig test [37,38,90,146,164] Validation (Sim./Exp)…”

Section: Type Referencesmentioning

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

show abstract

“…The proposed design is a new type of asynchronous DC generator with a rotating magnetic field. The principle is the same as Faraday's induction law [12][13][14]. The operation depends on the slope of the machine in regard to the water level.…”

Section: Operating Principlesmentioning

confidence: 99%

A Rolling Electrical Generator Design and Model for Ocean Wave Energy Conversion

Damacharla¹,

Fard

2020

Inventions

View full text Add to dashboard Cite

Wave and tidal energies are some of the most prominent potential sources of renewable energy. Presently, these energy sources are not being utilized to their maximum extent. In this paper, we present a new conversion mechanism with an innovative electrical energy converter design that enables the use of wave energy to its maximum potential. The conventional wave energy converter comprises two stages of conversion (kinetic to mechanical and mechanical to electrical), imposing transformation loss that reduces the overall system efficiency. Additionally, the architecture and operational norms are dependent on the availability of shoreline areas, and the convertor is not suitable for all ocean weather conditions. To solve these problems, we have developed a wave energy conversion system that integrates the two stages of power with the minimum number of moving parts. This results in significant reduction of transformation losses that otherwise occur in the process. This paper presents an innovative idea of designing a DC generator that reduces the hierarchy of power conversion levels involved to improve the efficiency. The back and forth motion of the machine means it operates in a two-quadrant generation mode. The machine was constructed as a square box model with windings placed on both the top and bottom stator plates, and the rotor consisted of a field winding placed between these plates with two axes of operation. The electromagnetic field (EMF) induced in the stator plates is due to the resulting flux cutting, which is generated by a rolling object (rotor) in between them. A finite element analysis (FEA) of the machine is also listed to validate the flux linkage and operational efficiency. Additionally, a generator is fabricated to the predetermined design criteria as a proof of concept and the corresponding results are posted in the paper. Additionally, we present the material and cost limitations of this invention and outline some possible future directions.

show abstract

“…In this article, a special type of synchronous generator with permanent magnets (PMSG) is analyzed. These machines are known for being the most efficient choice amidst the current generator designs on the market [6][7][8][9]. Furthermore, their great performance and low cost of conservation during their long lifespan make them the best choice in the cost-efficiency sense.…”

Section: Introductionmentioning

confidence: 99%

Modified Efficient Energy Conversion System Based on PMSG with Magnetic Flux Modulation

Krystkowiak

2023

Energies

View full text Add to dashboard Cite

The article presents the solution of a power rectifier system dedicated to cooperating with an electric generator based on a special synchronous generator, which can be used in wind or water energy systems. In this generator, a pair of three-phase windings in a stator is utilized. One of the windings is connected in a star, and the second one is connected in a delta configuration. Two six-pulse uncontrolled (diode) rectifiers are included at the outputs of the windings. The rectifiers are coupled by a pulse transformer. The primary windings of this transformer are supplied by a power-electronics current source called a current modulator. With the help of this current modulator, the quasi-sinusoidal magnetomotive force (mmf) in the stator of the machine can be obtained. Additionally, to improve the efficiency of the described system, the low-power transistor rectifier, which is connected to the DC bus of the current modulator, has been used. With the help of this converter, it is possible to control and stabilize the voltage level in a DC circuit. It works, in this case, in inverter mode. The principle of working and elaborated control methods of the current modulator and the additional rectifier are presented. Selected results of simulation and experimental tests are also presented.

show abstract

Optimal Design of Permanent Magnet Linear Generator and Its Application in a Wave Energy Conversion System

Cited by 13 publications

References 24 publications

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

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

A Rolling Electrical Generator Design and Model for Ocean Wave Energy Conversion

Modified Efficient Energy Conversion System Based on PMSG with Magnetic Flux Modulation

Contact Info

Product

Resources

About