Performance Study of a Piezoelectric Energy Harvester Based on Rotating Wheel Vibration
Rui Wang, Zhouman Jiang, Xiang Li, Xiaochao Tian, Xia Liu, Bo Jiang
TL;DR
This paper introduces a piezoelectric energy harvester that efficiently captures low-frequency vibration energy from vehicle wheels to power in-vehicle sensors.
Contribution
A novel piezoelectric harvester with dual cantilever beams and a synchronous switch circuit is proposed to improve low-frequency energy harvesting efficiency.
Findings
The harvester achieves an average output power of 3.019 mW under 20 Hz sinusoidal excitation.
The output voltage remains stable at 6.86 V under simulated road conditions at 70 km/h.
Multiphysics simulations reveal the impact of thickness ratio and mass block weight on power generation.
Abstract
To address the issue of low efficiency in recovering low-frequency vibration energy during vehicle operation, this paper proposes a piezoelectric energy capture harvester based on wheel vibration. The device employs a parallel configuration of dual cantilever beam piezoelectric transducers in its mechanical structure, with additional mass blocks to optimize its resonant characteristics in the low-frequency range. A synchronous switch energy harvesting circuit was designed. By actively synchronizing the switch with the peak output voltage of the piezoelectric element, it effectively circumvents the turn-on voltage threshold limitations of diodes in bridge rectifier circuits, thereby enhancing energy conversion efficiency. A dynamic model of this device was established, and multiphysics simulation analysis was conducted using COMSOL-Multiphysics to investigate the modal characteristics,…
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Taxonomy
TopicsInnovative Energy Harvesting Technologies · Vibration Control and Rheological Fluids · Wireless Power Transfer Systems