Vibration Energy Harvesting Using Relaxor Ferroelectric Transduction

The relaxor ferroelectric PIN-PMN-PT is an emerging material with outstanding electromechanical properties that holds promise for vibration energy harvesting applications. A prototype high frequency harvester was designed and assembled based on a 24PIN-PMN-PT [011] cut single crystal transducer which was mechanically loaded in the [100] direction during operation. Measured peak power output from the harvester was 78 mW from a host acceleration of 1,679 Hz and 3.5 g RMS which is a high frequency for a resonance based device. Under a wideband host acceleration of 0.5 g RMS, the harvester's measured half power bandwidth was 619 Hz.