Design and experiment of a magnetic lead screw for the point-absorbing wave energy conversion system

Aqiang Zhao, Weimin Wu*, Jiacheng Jiang, Lixun Zhu, Kaiyuan Lu, Frede Blaabjerg

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

2 Citations (Scopus)

Abstract

This study introduces a new structure of the magnetic lead screw (MLS) intended for wave energy conversion (WEC) applications. One of the key challenges in the application of MLS technology for wave energy lies in the manufacturing of its complicated ideal helix. Structural simplification and processing technology are quite essential in promoting the development of the magnet screw. This study proposes a new method for shaping the desired ideal helix in a simple way with parallelly magnetised magnets. This simple structure reduces manufacturing complexity while maintaining good force density. The magnets with parallel magnetisation are also easier and cheaper to manufacture than the magnets with radial magnetisation. A prototype is manufactured and tested in the laboratory. In addition, the electromagnetic performance of the new structure is evaluated as compared with the magnet screw with ideal helix using the three-dimensional finite element analysis, verifying the advantages of the proposed structure.
Original languageEnglish
JournalIET Electric Power Applications
Volume14
Issue number11
Pages (from-to)2146-2153
Number of pages8
ISSN1751-8660
DOIs
Publication statusPublished - Nov 2020

Bibliographical note

Funding Information:
This work was funded in part by the National Natural Science Foundation of China, grant number 51477094 and the Shanghai Science and Technology Commission, grant number 17040501500.

Publisher Copyright:
© 2020 Institution of Engineering and Technology. All rights reserved.

Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.

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