Efficient conversion of ambient energy, being intrinsically variable and in the low frequency range is a fundamental issue for the development of self-powered electronic systems. Simple and reliable solutions are based on piezoelectric or electromagnetic transducers. This work presents an innovative electromagnetic vibration-based energy converter, relying on two counteracting slotted disc springs, which originate a low stiffness mechanical system under a given preload. The electromagnetic converter, involving cylindrical permanent magnets, features coils with a peculiar ‘8’ loop configuration, on opposite sides of the magnets. The prototype was built with commercial components and purposely developed parts, manufactured through rapid prototyping. The experimental validation highlights an excellent response, both in terms of the multi-frequency behaviour and with regard to the significant power output also at low input accelerations.
Zhang S and Zhang H. A review of wireless sensor networks and its applications. In: 2012 IEEE international conference on automation and logistics, Zhengzhou, 15–17 August 2012, pp.386–389. IEEE.
4.
MitchesonPDYeatmanEMRaoGK. Energy harvesting from human and machine motion for wireless electronic devices. Proc IEEE2008; 96: 1457–1486.
5.
Despesse G, Jager T, Chaillout J, et al. Design and fabrication of a new system for vibration energy harvesting. In: Research in microelectronics and electronics, 2005 PhD, 2005, pp.10–13. Washington, DC, USA: IEEE.
Neri I, Travasso F, Mincigrucci R, et al. A real vibration database for kinetic energy harvesting application. J Intell Mater Syst Struct 23: 2095–2101, http://jim.sagepub.com/content/23/18/2095.abstract (2012, accessed 27 July 2016).
DeweiJJingL. Human power-based energy harvesting strategies for mobile electronic devices. Front Energy Power Eng China. 3: 27–46. http://link.springer.com/10.1007/s11708-009-0002-4 (2009, accessed 24 July 2014).
10.
KhalighAZengPZhengC. Kinetic energy harvesting using piezoelectric and electromagnetic technologies—state of the art. IEEE Transactions on Industrial Electronics2010; 57: 850–860.
BenasciuttiDMoroLZelenikaS. Vibration energy scavenging via piezoelectric bimorphs of optimized shapes. Microsyst Technol. 16: 657–668. http://link.springer.com/10.1007/s00542-009-1000-5 (2010, accessed 23 July 2014).
15.
Glynne-JonesPBeebySPWhiteNM. Towards a piezoelectric vibration-powered microgenerator. IEE Proc Sci Meas Technol2001; 148: 68–72.
RoundySWrightPKRabaeyJ. A study of low level vibrations as a power source for wireless sensor nodes. Computer Communications2003; 26: 1131–1144.
18.
ShenDChoeS-YKimD-J. Analysis of piezoelectric materials for energy harvesting devices under high-g vibrations. Jpn J Appl Phys. 46: 6755–6760. http://stacks.iop.org/1347-4065/46/6755 (2007, accessed 24 July 2014).
19.
Benasciutti D, Moro L and Gallina M. On the optimal bending deflection of piezoelectric scavengers. J Intell Mater Syst Struct 2013 24: 627–639. doi:10.1177/1045389X12469451.
20.
CastagnettiD. Fractal-inspired multifrequency structures for piezoelectric harvesting of ambient kinetic energy. J Mech Des2011; 133: 111005–111005.
21.
CastagnettiD. Experimental modal analysis of fractal-inspired multi-frequency structures for piezoelectric energy converters. Smart Mater Struct2012; 21: 094009–094009.
CastagnettiD. A Belleville-spring-based electromagnetic energy harvester. Smart Mater Struct. 24: 94009–94009. http://stacks.iop.org/0964-1726/24/i=9/a=094009 (2015, accessed 27 July 2016).
BiboALiGDaqaqMF. Electromechanical modeling and normal form analysis of an aeroelastic micro-power generator. J Intell Mater Syst Struct2011; 22: 577–592.
27.
BryantMGarciaE. Modeling and testing of a novel aeroelastic flutter energy harvester. J Vib Acoust2011; 133: 11010–11010.
28.
SinghKMichelinSDe LangreE. Energy harvesting from axial fluid-elastic instabilities of a cylinder. J Fluids Struct2012; 30: 159–172.
29.
Burrow SG, Clare LR, Carrella A, et al. Vibration energy harvesters with non-linear compliance. In: The 15th international symposium on: smart structures and materials and nondestructive evaluation and health monitoring. International Society for Optics and Photonics, 2008, p.692807. Bellingham WA, USA.
30.
MannBPSimsND. Energy harvesting from the nonlinear oscillations of magnetic levitation. J Sound Vib2009; 319: 515–530.
31.
RamlanRBrennanMJMaceBR. Potential benefits of a non-linear stiffness in an energy harvesting device. Nonlinear Dyn2010; 59: 545–558.
