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Energies 2016, 9(7), 487; doi:10.3390/en9070487

A Study on a Linear Magnetic-Geared Interior Permanent Magnet Generator for Direct-Drive Wave Energy Conversion

1
School of Electrical Engineering, Southeast University, Nanjing 210096, China
2
College of Mechanical and Electrical Engineering, Jiaxing University, Jiaxing 314000, China
*
Author to whom correspondence should be addressed.
Academic Editor: Frede Blaabjerg
Received: 1 April 2016 / Revised: 24 May 2016 / Accepted: 17 June 2016 / Published: 24 June 2016
View Full-Text   |   Download PDF [4555 KB, uploaded 24 June 2016]   |  

Abstract

The conventional linear permanent magnet generator (CLPMG) for direct-drive wave energy conversion (WEC) has experienced many drawbacks that are difficult to overcome such as low power density and bulky system volume. To improve power density, this paper proposes a linear magnetic-geared interior permanent magnet generator (LMGIPMG) with tubular topology, which artfully incorporates a linear magnetic gear into a linear permanent magnet generator. The operating principle of the LMGIPMG is introduced, and a detailed analysis of air gap flux density, thrust force characteristics, and no-load and load performances are presented and discussed by using finite element method. The CLPMG, which produces the same power as the LMGIPMG, has about four times the volume of the latter. A prototype CLPMG is manufactured to verify simulation results against experimental tests. The design method and the operation conditions of LMGIPMG and CLPMG are both consistent; thus, the performance of LMGIPMG meets the operation requirements of the direct-drive WEC. View Full-Text
Keywords: finite element analysis; linear permanent magnet generator; magnetic gear; wave energy conversion finite element analysis; linear permanent magnet generator; magnetic gear; wave energy conversion
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MDPI and ACS Style

Feng, N.; Yu, H.; Hu, M.; Liu, C.; Huang, L.; Shi, Z. A Study on a Linear Magnetic-Geared Interior Permanent Magnet Generator for Direct-Drive Wave Energy Conversion. Energies 2016, 9, 487.

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