Study on Wind Energy Harvesting Effect of a Vehicle-mounted Piezo-electromagnetic Hybrid Energy Harvester

Xia Li, Zhiyuan Li, Cheng Bi, Benxue Liu, Yufeng Su
2020 IEEE Access  
To realize the self-power of the vehicle micro-sensors, a piezo-electromagnetic hybrid vehiclemounted energy harvester is proposed to recover the wind and vibration energy generated during driving. This energy harvester includes a flutter piezoelectric energy harvesting structure (FPEH) and an electromagnetic vibration energy harvester structure (EVEH). The combination of the two structures can improve the energy harvesting effect and reduce the cut-in wind speed. The coupled vibration
more » ... cal model is established to predict the output performance of the wind energy harvesting effect. The effects of the different distances between magnets on the output are discussed. And the vibration characteristics of piezoelectric and electromagnetic vibrators are analyzed. Results show that the energy-harvesting effect is the best when the distance between magnets is 30mm. At the same time, the numerical simulation proves that the wind energy harvesting effect of the hybrid structure is better than the classic flutter structure. The experimental verification is carried out, and the experimental results are consistent with the theoretical prediction results, which verified the correctness of the theory. The optimal load of FPEH is 70k, and the optimal load of EVEH is 60.Under these conditions, when the wind speed is 18m/s, the peak output power of FPEH is 14.5mW, and that of EVEH is 31.8mW.
doi:10.1109/access.2020.3023649 fatcat:chxvsouemzhobibdgecuncbujy