Investigation of Multi-phase Tubular Permanent Magnet Linear Generator for Wave Energy Converters

Gargov, N. P.; Zobaa, Ahmed F.; Pisică, Ioana

doi:10.1080/15325008.2013.848496

Cited by 7 publications

(5 citation statements)

References 22 publications

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“…The PMLAs have gained popularity due to their merits, such as high velocity, precise movement, long life, and efficiency. Therefore, they are applied in many areas, for example, power production in free-piston linear generator (FPLG) systems, wave energy converters (WEC), hybrid electric vehicles (HEV), suspension systems of HEVs, thermoacoustic engines, and electric transformers [7][8][9][10][11][12]. Additionally, they can be used in energy recovery systems and power production for the lunar base [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Design of a Slot-Spaced Permanent Magnet Linear Alternator Based on Numerical Analysis

Cheng

Dhanasekaran

2022

Energies

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Linear alternators work seamlessly with Free-Piston Stirling Engines (FPSE) in the energy conversion process. This research concentrates on the design and development of a tubular slot-spaced Permanent Magnet Linear Alternator (PMLA) to be coupled with the FPSE. In an attempt to increase the power density of the machine over conventional PMLAs, a slot space is added to reduce the total mass of the stator and a parametrical study is carried out for the same. Numerically analyzing the fundamental parameters such as change of stator and magnet materials, and operating conditions frequency and stroke length. The effects of slotting are studied to understand the skinning effects on the tooth and the performance variation of the machine. A modified model is obtained to surpass 100 W from the numerical analysis of the parametric variations. Putting the machine to extreme limitations, the study conducted upon variations of parameters obtained a stable maximum power density of 186 W/kg and produced a power of 921 W for the designed PMLA. The study outlines the variation seen in the performance of the machine in such diverse conditions they go through during their life cycle.

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Section: Introductionmentioning

confidence: 99%

Design of a Slot-Spaced Permanent Magnet Linear Alternator Based on Numerical Analysis

Cheng

Dhanasekaran

2022

Energies

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“…The perk of a linear alternator is reversible; it can be used as an actuator for multiple applications which requires two machines to start and continue to produce power [2]. In the recent past, linear electric actuators and generators have become popular in domains such as FPSE, wave energy harvesting, hybrid electric vehicles, and sub-domaining applications such as waste heat recovery, concentrated solar power, and space applications [3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

“…Wave energy is another key application of linear alternators. The fundamental difference observed in the applications of PMLAs in wave energy harvesting and combustion (internal and external) engines from a bird's-eye view is Wave Energy Converters (WECs), which have a long stroke length and low frequency, and combustion inputs have a smaller stroke length and a higher frequency [4,13]. However, the construction and operation features of both of the alternator applications are different.…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis and Parametric Study of a 7 kW Tubular Permanent Magnet Linear Alternator

Cheng

Dhanasekaran

2021

Sustainability

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Free-Piston Stirling Engines (FPSEs) are known for their easy maintenance, longer lifetimes, high reliability, quiet operation due to no crankshafts, and having fewer seals compared to the traditional Stirling engine. Free-piston systems are popular in the conversion of thermal energy into electrical energy and are compatible with many types of heat sources. This research paper concentrates on the development of a Permanent Magnet Linear Alternator (PMLA) and parametrically analyzing it to predict its limitations and performance over variable operable conditions and material choices. Operable conditions including stroke length and frequency of the translator, and material choice for the stator and magnets, are varied in this study to analyze the machine and put it to test for its extreme limitations. Spacing between slots is introduced to reduce the overall mass of the stator and increase the power density. The load test is carried out with varied parameters. It induces a load EMF of 2.4 kV, yields a power of 7 kW, and has a power density of 314 W/kg by FEM analysis in peak variations. This study enumerates the performance variation of a PMLA over these varied conditions and illustrates the limitations of such power-dense machines.

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“…One configuration of the AFPM machines is a double-sided machine with internal stator and two lateral rotors. Medium and large power sizes of such AFPMs have applications especially in low-speed high-torque applications; such as electrical vehicles and direct-drive wind energy conversion [5][6][7][8]. In this configuration, the slotless stator core has advantages such as simple structure, eliminated cogging torque, reduced rotor surface losses, magnetic saturation and the acoustic noise, in contrast to disadvantages such as more PM usage, lower winding inductance that sometimes causes problems for inverter-fed motors, and more eddy current losses in slotless conductors [9].…”

Section: Introductionmentioning

confidence: 99%

Design and analysis of double‐sided slotless axial‐flux permanent magnet machines with conventional and new stator core

Hekmati

Yazdanpanah

Mirsalim

2015

IET Electric Power Applications

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The objective of this paper is to present the design equations of the conventional double-sided axial-flux slotless brushless DC machine (BLDC) and the new one with the trapezoidal cross-section core as well as performances comparison based on the proposed design algorithm. Direct search method is used to find the optimum designs, whereas machines with the rated power of 0.25-10 kW are compared. Efficiency and size of the optimum designed machines are presented to make a comprehensive study for choosing the best topology from the viewpoint of electrical and geometrical characteristics. Finite element analysis and experimental results are presented to show the validity of the derived equations and the design outcomes.

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Investigation of Multi-phase Tubular Permanent Magnet Linear Generator for Wave Energy Converters

Abstract: In this paper, an investigation into different magnetisation topologies for a Long Stator Tubular

Cited by 7 publications

References 22 publications

Design of a Slot-Spaced Permanent Magnet Linear Alternator Based on Numerical Analysis

Design of a Slot-Spaced Permanent Magnet Linear Alternator Based on Numerical Analysis

Numerical Analysis and Parametric Study of a 7 kW Tubular Permanent Magnet Linear Alternator

Design and analysis of double‐sided slotless axial‐flux permanent magnet machines with conventional and new stator core

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