Abstract
A coupled piezoelectric-electromagnetic energy harvester was designed, the expression of output power was derived by the electromechanical couplingstate equations. The output characteristics of piezoelectric, electromagnetic and coupled piezoelectric-electromagnetic energy harvesters were compared through experimental tests.The results show that the 3 dB bandwidth of the coupled piezoelectric-electromagnetic energy harvester was increased by 67% and 25% compared with piezoelectric and electromagnetic energy harvesters, respectively, resulting in an increase of 38% and 118% in maximum output power respectively. The energy collecting circuit of coupled piezoelectric-electromagnetic energy harvester was designed.The electric energy converted from piezoelectric energy-harvesting unit and electromagnetic energy-harvesting unit were collected by LTC3588 and LTC3108 chips separately, and then stored in a super-capacitor. The charge tests of super-capacitor were conducted using three energy harvesters separately. It is indicated that the charge time of coupled piezoelectric-electromagnetic energy harvester was decreased by 29% and 52% compared with piezoelectric and electromagnetic energy harvesters, respectively.
| Original language | English |
|---|---|
| Pages (from-to) | 902-905 |
| Number of pages | 4 |
| Journal | Yadian Yu Shengguang/Piezoelectrics and Acoustooptics |
| Volume | 38 |
| Issue number | 6 |
| Publication status | Published - 1 Dec 2016 |
Keywords
- Bandwidth
- Charge time
- Output power
- Super-capacitor
- Vibration