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 μW continuous power with 20 mV voltage between 3.3 and 3.6 kHz of external vibration.