Broadband electromagnetic vibration energy harvesting system for powering wireless sensor nodes

Anthony Marin, John Turner, Dong Sam Ha, Shashank Priya

Research output: Contribution to journalArticlepeer-review

28 Scopus citations

Abstract

This paper reports the design of an electromagnetic vibration energy harvesting system that provides high power density and broad bandwidth. The 'double cell' harvester was chosen as the generator for this system. In order to harvest power over a broad range of frequencies, four 'double cell' harvesters with varying resonances were incorporated in the system architecture. The average AC to regulated DC power conversion efficiency across the 4 Hz bandwidth was 78%, which is one of the highest reported magnitudes for an electromagnetic vibration harvesting system. The magnetic flux density variation within the double cell array was modeled using the finite element method and compared to a single cell with equivalent tip mass and magnet volume. The double cell array was found to generate a similar magnitude of power to a single cell but three times higher bandwidth. The average generator conversion efficiency for the double cell array was 45.3%, which approaches the maximum theoretical limit of 50%.

Original languageEnglish (US)
Article number075008
JournalSmart Materials and Structures
Volume22
Issue number7
DOIs
StatePublished - Jul 1 2013

All Science Journal Classification (ASJC) codes

  • Signal Processing
  • Civil and Structural Engineering
  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Electrical and Electronic Engineering

Fingerprint Dive into the research topics of 'Broadband electromagnetic vibration energy harvesting system for powering wireless sensor nodes'. Together they form a unique fingerprint.

Cite this