Research on a permanent magnet tubular linear generator for direct drive wave energy conversion

Author

Chunyuan Liu ; Haitao Yu ; MinQiang Hu ; Qiang Liu ; Shigui Zhou ; Lei Huang

Author_Institution

Eng. Res. Center of Motion Control of Minist. of Educ., Southeast Univ., Nanjing, China

Volume

8

Issue

3

fYear

2014

fDate

Apr-14

Firstpage

281

Lastpage

288

Abstract

An external tubular linear permanent magnet generator (ETLPMG) is proposed for direct drive wave energy conversion. ETLPMG with quasi-Halbach array is larger in the air gap magnetic flux density than the internal and radial magnetisation one. An assistant tooth and fractional slot are implemented to decrease the detent force. The power density of ETLPMG is about 7-8 times for that of the internal one and the efficiency reached 90.03% at 18 Ω condition. The characteristics of the ETLPMG are analysed with a finite element analysis. Finally, a prototype is manufactured to verify the simulation results by some experiment tests.

Keywords

electric drives; finite element analysis; linear machines; machine insulation; machine testing; magnetic flux; magnetisation; permanent magnet generators; wave power generation; ETLPMG; air gap magnetic flux density; assistant tooth; direct drive wave energy conversion; efficiency 90.03 percent; external tubular linear permanent magnet generator; finite element analysis; fractional slot; internal magnetisation; power density; quasiHalbach array; radial magnetisation; resistance 18 ohm;

fLanguage

English

Journal_Title

Renewable Power Generation, IET

Publisher

iet

ISSN

1752-1416

Type

jour

DOI

10.1049/iet-rpg.2012.0364

Filename

6777919