Design and analysis of tubular permanent magnet linear generator for small-scale wave energy converter

Jeong-Man Kim,Min-Mo Koo,Il-Hyoung Cho,Jang-Young Choi,Keyyong Hong,Jae-Hoon Jeong

doi:10.1063/1.4974496

Jeong-Man Kim, Min-Mo Koo + Show 4 more

Open Access

https://doi.org/10.1063/1.4974496

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Abstract

This paper reports the design and analysis of a tubular permanent magnet linear generator (TPMLG) for a small-scale wave-energy converter. The analytical field computation is performed by applying a magnetic vector potential and a 2-D analytical model to determine design parameters. Based on analytical solutions, parametric analysis is performed to meet the design specifications of a wave-energy converter (WEC). Then, 2-D FEA is employed to validate the analytical method. Finally, the experimental result confirms the predictions of the analytical and finite element analysis (FEA) methods under regular and irregular wave conditions.

Highlights

With increasing environmental concern, significant effort is being devoted to research and development of renewable energy sources
This paper presents the design and analysis of a tubular permanent magnet linear generator (TPMLG) for a small-scale wave energy converter (WEC)
The magnet topologies consist of axially magnetized PMs (AMPMs) and iron poles to create a magnetic flux path

Summary

INTRODUCTION

Significant effort is being devoted to research and development of renewable energy sources. Linear machines, which can be operated without the need to convert rotary motion to linear motion, have significant advantages, such as simplicity and high efficiency over rotary machines. Tubular permanent magnet (PM) topologies are attractive among the various types of linear machines. Tubular linear machines have advantage compared to flat linear machines because they produce high thrust due to high permanent magnet coefficient of utilization and do not have normal force.[3,4]. This paper presents the design and analysis of a tubular permanent magnet linear generator (TPMLG) for a small-scale WEC. Based on the analytical solution, parametric analysis is performed so as to satisfy the design specifications of the WEC. 2-D finite element analysis (FEA) is employed to validate the analytical method. The experimental result is used to confirm the predictions of the analytical and FEA methods under regular and irregular wave conditions

Analysis model

Magnetic field calculation

Design of TPMLG for WEC

CONCLUSIONS