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Multimodal energy harvesting system: Piezoelectric and electromagnetic

Journal Article


Abstract


  • In this study, we report a multimodal energy harvesting device that combines electromagnetic and piezoelectric energy harvesting mechanism. The device consists of piezoelectric crystals bonded to a cantilever beam. The tip of the cantilever beam has an attached permanent magnet which, oscillates within a stationary coil fixed to the top of the package. The permanent magnet serves two purpose (i) acts as a tip mass for the cantilever beam and lowers the resonance frequency, and (ii) acts as a core which oscillates between the inductive coils resulting in electric current generation through Faraday's effect. Thus, this design combines the energy harvesting from two different mechanisms, piezoelectric and electromagnetic, on the same platform. The prototype system was optimized using the finite element software, ANSYS, to find the resonance frequency and stress distribution. The power generated from the fabricated prototype was found to be 0.25 W using the electromagnetic mechanism and 0.25 mW using the piezoelectric mechanism at 35 g acceleration and 20 Hz frequency. �� 2009 SAGE Publications.

Publication Date


  • 2009

Citation


  • Tadesse, Y., Shujun Zhang., & Priya, S. (2009). Multimodal energy harvesting system: Piezoelectric and electromagnetic. Journal of Intelligent Material Systems and Structures, 20(5), 625-632. doi:10.1177/1045389X08099965

Scopus Eid


  • 2-s2.0-61849182615

Start Page


  • 625

End Page


  • 632

Volume


  • 20

Issue


  • 5

Place Of Publication


Abstract


  • In this study, we report a multimodal energy harvesting device that combines electromagnetic and piezoelectric energy harvesting mechanism. The device consists of piezoelectric crystals bonded to a cantilever beam. The tip of the cantilever beam has an attached permanent magnet which, oscillates within a stationary coil fixed to the top of the package. The permanent magnet serves two purpose (i) acts as a tip mass for the cantilever beam and lowers the resonance frequency, and (ii) acts as a core which oscillates between the inductive coils resulting in electric current generation through Faraday's effect. Thus, this design combines the energy harvesting from two different mechanisms, piezoelectric and electromagnetic, on the same platform. The prototype system was optimized using the finite element software, ANSYS, to find the resonance frequency and stress distribution. The power generated from the fabricated prototype was found to be 0.25 W using the electromagnetic mechanism and 0.25 mW using the piezoelectric mechanism at 35 g acceleration and 20 Hz frequency. �� 2009 SAGE Publications.

Publication Date


  • 2009

Citation


  • Tadesse, Y., Shujun Zhang., & Priya, S. (2009). Multimodal energy harvesting system: Piezoelectric and electromagnetic. Journal of Intelligent Material Systems and Structures, 20(5), 625-632. doi:10.1177/1045389X08099965

Scopus Eid


  • 2-s2.0-61849182615

Start Page


  • 625

End Page


  • 632

Volume


  • 20

Issue


  • 5

Place Of Publication