A Wideband Electromagnetic Micro Power Generator for Wireless Microsystems

This paper presents a wideband electromagnetic (EM) vibration-to-electrical power generator which can efficiently scavenge energy and generate steady power over a predetermined frequency range. Power is generated by means of electromagnetic induction using a magnet and coils on top of resonating cantilever beams. The reported generator covers a wide band of external vibration frequency by implementing a number of serially connected cantilevers in different lengths. The device generates 0.5 muW continuous power with 20 mV voltage between 3.3 and 3.6 kHz of external vibration.

[1]  T.C. Green,et al.  Architectures for vibration-driven micropower generators , 2004, Journal of Microelectromechanical Systems.

[2]  K. Najafi,et al.  An electromagnetic micro power generator for low-frequency environmental vibrations , 2004, 17th IEEE International Conference on Micro Electro Mechanical Systems. Maastricht MEMS 2004 Technical Digest.

[3]  Wen J. Li,et al.  Development of an AA size energy transducer with micro resonators , 2003, Proceedings of the 2003 International Symposium on Circuits and Systems, 2003. ISCAS '03..

[4]  Marco Ferrari,et al.  Piezoelectric multifrequency energy converter for power harvesting in autonomous microsystems , 2008 .

[5]  Jan M. Rabaey,et al.  Improving power output for vibration-based energy scavengers , 2005, IEEE Pervasive Computing.

[6]  Rajeevan Amirtharajah,et al.  Self-powered signal processing using vibration-based power generation , 1998, IEEE J. Solid State Circuits.

[7]  Neil M. White,et al.  An electromagnetic, vibration-powered generator for intelligent sensor systems , 2004 .