Cylindrical halbach magnet array for electromagnetic vibration energy harvesters

Author

Shahosseini, Iman ; Najafi, Khalil

Author_Institution

Center for Wireless Integrated MicroSensing & Syst. (WIMS2), Univ. of Michigan, Ann Arbor, MI, USA

fYear

2015

fDate

18-22 Jan. 2015

Firstpage

1051

Lastpage

1054

Abstract

This paper reports the design, optimization, and test results of a new magnetic structure for kinetic energy harvesters allowing seven-fold increase in power density compared to single-magnet configuration. Electromagnetic energy harvesters with “single cylindrical Halbach array” and “double-concentric Halbach array” magnetic structures composed of NdFeB magnets with 1.4 T residual flux density were fabricated and tested: respectively 5 mW and 15 mW power was measured and generated at low-amplitude (1 mm) low-frequency (<;10 Hz) vibrations. These structures yield respectively a maximum power density of 14 mW/cm³/g² and 26 mW/cm³/g².

Keywords

electromagnetic devices; energy harvesting; magnetic flux; magnetic structure; magnets; vibrations; cylindrical Halbach magnet array; double-concentric Halbach array magnetic structure; electromagnetic vibration energy harvester; kinetic energy harvester; power 15 mW; power 5 mW; power density; Arrays; Coils; Density measurement; Magnetic flux; Magnetic resonance; Power system measurements; Soft magnetic materials;

fLanguage

English

Publisher

ieee

Conference_Titel

Micro Electro Mechanical Systems (MEMS), 2015 28th IEEE International Conference on

Conference_Location

Estoril

Type

conf

DOI

10.1109/MEMSYS.2015.7051143

Filename

7051143