Title :
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
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;
Journal_Title :
Renewable Power Generation, IET
DOI :
10.1049/iet-rpg.2012.0364
