An impact-driven frequency up-converter without coupling phase for electret-based vibration energy harvester

Zhaoshu Yang; Lihua Tang; Kai Tao; Guoping Liu; Kean C. Aw

doi:10.1117/12.2614421

20 April 2022 An impact-driven frequency up-converter without coupling phase for electret-based vibration energy harvester

Zhaoshu Yang, Lihua Tang, Kai Tao, Guoping Liu, Kean C. Aw

Author Affiliations +

Proceedings Volume 12043, Active and Passive Smart Structures and Integrated Systems XVI; 120431C (2022) https://doi.org/10.1117/12.2614421
Event: SPIE Smart Structures + Nondestructive Evaluation, 2022, Long Beach, California, United States

Conference Poster

Abstract

One critical issue of electret-based vibrational energy harvesters (eVEHs) for wearable applications is to improve their adaptability for low-frequency ambient environments. This paper exploits the impact-driven frequency up-converter without coupling phase to improve the power output of an electret-based vibration energy harvester. A vibro-impact model is established, solved numerically by SIMULINK, and verified by SOLIDWORKS/motion study tool. The frequency up-conversion mechanism with delicately avoided coupling phase is demonstrated to improve the power output of the eVEH significantly. According to our analysis, the proposed technique improves the energy harvesting efficiency of eVEH by 40%, for an ultra-low frequency excitation of 2 Hz. By and large, the work of this paper could potentially extend the application of eVEH in low frequency scenarios.

Citation Download Citation

Zhaoshu Yang, Lihua Tang, Kai Tao, Guoping Liu, and Kean C. Aw "An impact-driven frequency up-converter without coupling phase for electret-based vibration energy harvester", Proc. SPIE 12043, Active and Passive Smart Structures and Integrated Systems XVI, 120431C (20 April 2022); https://doi.org/10.1117/12.2614421

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