Electromagnetic Buckled Beam Oscillator for Enhanced Vibration Energy Harvesting

In this work, a nonlinear vibration energy harvester consisting of a buckled beam and an electromagnetic transducer is proposed. An advantage of this device is that there is no need of permanent magnets to create the bistable potential. Theoretical modeling and experimental investigations on a prototype are presented. The prototype demonstrates a peak power of 2.96 mW at resonance of 52 Hz under 0.32 g of acceleration in the unbuckled configuration, while under bistable regime, it shows a gain up to 115% of power. Besides, both systems show a large bandwidth response compared to resonant cantilever devices.