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Increasing output power of electromagnetic vibration energy harvesters using improved Halbach arrays

Increasing output power of electromagnetic vibration energy harvesters using improved Halbach arrays
Increasing output power of electromagnetic vibration energy harvesters using improved Halbach arrays
This paper extends previously published studies into the performance of Halbach arrays for electromagnetic vibration energy harvesting. A Halbach array is a specific arrangement of permanent magnets that concentrates the magnetic field on one side of the array while cancelling the field to almost zero on the other side. This arrangement can improve electromagnetic coupling in a limited space. Previous research showed that although the Halbach array has higher magnetic field density compared to normal magnet layouts, its magnetic flux change rate is not necessarily high. Thus, output powers of energy harvesters with standard Halbach arrays are not always greater than those with normal magnet layouts. Two improvements to the Halbach arrays that lead to increased output power of electromagnetic vibration energy harvesters are presented in this paper. Test results showed that the proposed improved Halbach arrays can increase the output power of energy harvesters by a factor of seven compared to the standard Halbach array.
0924-4247
11-19
Zhu, Dibin
ec52eae1-39fa-427c-968b-e76089a464a6
Beeby, SP
ba565001-2812-4300-89f1-fe5a437ecb0d
Tudor, MJ
46eea408-2246-4aa0-8b44-86169ed601ff
Harris, Nick
237cfdbd-86e4-4025-869c-c85136f14dfd
Zhu, Dibin
ec52eae1-39fa-427c-968b-e76089a464a6
Beeby, SP
ba565001-2812-4300-89f1-fe5a437ecb0d
Tudor, MJ
46eea408-2246-4aa0-8b44-86169ed601ff
Harris, Nick
237cfdbd-86e4-4025-869c-c85136f14dfd

Zhu, Dibin, Beeby, SP, Tudor, MJ and Harris, Nick (2013) Increasing output power of electromagnetic vibration energy harvesters using improved Halbach arrays. Sensors and Actuators A: Physical, 203, 11-19. (doi:10.1016/j.sna.2013.08.008).

Record type: Article

Abstract

This paper extends previously published studies into the performance of Halbach arrays for electromagnetic vibration energy harvesting. A Halbach array is a specific arrangement of permanent magnets that concentrates the magnetic field on one side of the array while cancelling the field to almost zero on the other side. This arrangement can improve electromagnetic coupling in a limited space. Previous research showed that although the Halbach array has higher magnetic field density compared to normal magnet layouts, its magnetic flux change rate is not necessarily high. Thus, output powers of energy harvesters with standard Halbach arrays are not always greater than those with normal magnet layouts. Two improvements to the Halbach arrays that lead to increased output power of electromagnetic vibration energy harvesters are presented in this paper. Test results showed that the proposed improved Halbach arrays can increase the output power of energy harvesters by a factor of seven compared to the standard Halbach array.

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More information

Published date: September 2013
Organisations: EEE

Identifiers

Local EPrints ID: 356767
URI: https://eprints.soton.ac.uk/id/eprint/356767
ISSN: 0924-4247
PURE UUID: 65b46e19-7c01-41d6-bb3f-79d82822a956
ORCID for SP Beeby: ORCID iD orcid.org/0000-0002-0800-1759
ORCID for Nick Harris: ORCID iD orcid.org/0000-0003-4122-2219

Catalogue record

Date deposited: 16 Sep 2013 10:50
Last modified: 06 Jun 2018 13:08

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