An Inductorless Self-Controlled Rectifier for Piezoelectric Energy Harvesting

Sensors

Shaohua Lu¹  Farid Boussaid² 

[1] University of Western Australia, 35 Stirling Highway, Crawley, Western Australia 6009, Australia; E-Mail

关键词: piezoelectric energy harvesting;    AC-DC power conversion;    SSHI;    rectifier;   

DOI  :  10.3390/s151129192

来源: mdpi

【 摘 要 】

This paper presents a high-efficiency inductorless self-controlled rectifier for piezoelectric energy harvesting. High efficiency is achieved by discharging the piezoelectric device (PD) capacitance each time the current produced by the PD changes polarity. This is achieved automatically without the use of delay lines, thereby making the proposed circuit compatible with any type of PD. In addition, the proposed rectifier alleviates the need for an inductor, making it suitable for on-chip integration. Reported experimental results show that the proposed rectifier can harvest up to 3.9 times more energy than a full wave bridge rectifier.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.