An electromagnetic micro power generator for wideband environmental vibrations

Sari I., Balkan T., KÜLAH H.

SENSORS AND ACTUATORS A-PHYSICAL, vol.145, pp.405-413, 2008 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 145
  • Publication Date: 2008
  • Doi Number: 10.1016/j.sna.2007.11.021
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.405-413
  • Keywords: micro power generation, electromagnetic power generation, energy scavenging, energy harvesting, frequency sweeper
  • Middle East Technical University Affiliated: Yes


This paper presents a wideband electromagnetic vibration-to-electrical micro power generator. The micro generator is capable of generating steady power over a predetermined frequency range. Power is generated by means of the relative motion between a magnet and coils fabricated over resonating cantilevers through electromagnetic induction. The reported generator covers a wide band of external vibration frequency by implementing a number of serially connected cantilevers in different lengths resulting in an array of cantilevers with varying natural frequencies. The device generates 0.4 mu W of continuous power with 10 mV voltage in an external vibration frequency range of 4.2-5 kHz, covering a band of 800 Hz. (c) 2007 Elsevier B.V. All rights reserved.