Analysis on the Optimal Geometrical Parameters of Topology Power Optimized Coil Based on a Cylindrical Magnet for Vibration-Based Electromagnetic Energy Harvester

Abstract:

This paper presents the analysis on geometrical parameters of the power-optimized coil based on Faradays principle by maximizing the coverage of magnetic flux linkage by the coil using a cylindrical permanent magnet of 6 mm diameter and 6 mm height. Faradays law states that induced voltage is the rate of change of flux linkage, meaning more winding induces more voltage. However it will increase also the resistance of the coil because the length of copper wire will also increase, which will reduce the generated power and power-density by the harvester according to Joules and Ohms laws. Simulation is used to virtually wind the inner and outer geometrical parameters of the coil using the given boundaries and the dimensions with highest output power are determined. The proposed form of the coil is cap-like shape which covers top half of the magnet where the amount of surrounding magnetic flux linkage is maximal. The result showed the induced power could be improved up to 60% using this method compared to usage of conventional ring-shaped coils.

• Periodical: Advanced Materials Research (Volume 903)
• Pages: 332-337
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.903.332
• Online since: February 2014
• Authors: Wan Hasbullah Mohd Isa, Ismayuzri Ishak
• Keywords: Coil, Electromagnetic, Harvester, Optimal Power, Power-Density, Power-Optimized, Vibration

References

[1] P.D. Mitcheson, E.M. Yeatman, G.K. Rao, A.S. Holmes, T.C. Green, Energy harvesting from human and machine motion for wireless electronic devices, Proc. IEEE. 96. (2008) 1457–1486.

DOI: 10.1109/jproc.2008.927494

[2] S. Shearwood and R.B. Yates, Development of an electromagnetic micro-generator, Electron. Lett. 33 (1997) 1883–1884.

DOI: 10.1049/el:19971262

[3] N.M. White, P. Glynne-Jones, and S. Beeby, A novel thick-film piezoelectric micro-generator, Smart Mater. Struct. 10 (2001) 850–852.

DOI: 10.1088/0964-1726/10/4/403

[4] S. Roundy, P.K. Wright, and K.S. Pister, Micro-electrostatic vibration-to-electricity converters, Proc. 2002 ASME Int. Mechan. Eng. Congress and Exposition. (2002).

DOI: 10.1115/imece2002-39309

[5] Q. Zhang, A. Agbossou, Z. Feng, and M. Cosnier, Solar Micro-Energy Harvesting Based on Thermoelectric and Latent Heat Effects. Part II: Experimental Analysis, Sensors and Actuators A: Physical. (2010) 284-290.

DOI: 10.1016/j.sna.2010.06.027

[6] R.J.M. Vullers, Micropower energy harvesting, Solid-State Electronics. 53(7) (2009) 684-693.

DOI: 10.1016/j.sse.2008.12.011

[7] D. Spreemann, Comparative Study of Electromagnetic Coupling Architectures for Vibration Energy Harvesting Devices, PowerMEMS. (2008).

[8] D. Spreemann, Electromagnetic Vibration Energy Harvesting Devices: Architectures, Design, Modeling and Optimization, Springer, Heidelberg, (2012).

DOI: 10.1007/978-94-007-2944-5