Evaluation of the Output Load Effect on a Piezoelectric Energy Harvester

Journal of control, automation and electrical systems

article

Coelho, M. A. J.¹  Flores, J. V.¹  Brusamarello, V. J.¹ 

[1] Electrical Engineering Graduate Program, Federal University of Rio Grande do Sul

关键词: Energy harvesting;    Frequency response;    Output load;    Piezoelectricity;   

DOI  :  10.1007/s40313-018-0383-x

学科分类：自动化工程

来源: Springer

【 摘 要 】

This paper presents the study of a vibration energy harvesting system using piezoelectric generator coupled to a cantilever beam when subjected to output loads with different electrical characteristics. The proposed analysis is based on the system frequency response under two scenarios at the output of the piezoelectric energy harvester: a purely resistive load and a full-wave rectifier before the load. A prototype capable of varying the amplitude and frequency of the input mechanical stimulus was constructed in order to evaluate the energy harvester. Then system identification techniques were employed to determine how the resonance frequency and output power are affected by the load. Experimental results showed that depending on the load there is significant change on the operating point at which the maximum power transfer occurs.

【 授权许可】

CC BY