A self-powered power management circuit for energy harvested by a piezoelectric cantilever

Author

Kong, Na ; Cochran, Travis ; Ha, Dong Sam ; Lin, Hung-Chih ; Inman, Daniel J.

Author_Institution

Virginia Polytech. Inst. & State Univ., Blacksburg, VA, USA

fYear

2010

fDate

21-25 Feb. 2010

Firstpage

2154

Lastpage

2160

Abstract

This paper presents development of a self-powered power management circuit for energy harvested by a piezoelectric cantilever. A full-wave rectifier followed by a buck-boost converter running in the discontinuous conduction mode rectifies the AC output, matches the source impedance, and generates a regulated DC output provided the input power is sufficient to charge up the load. A low power microcontroller unit is used for the maximum power point tracking and the output voltage regulation. Experimental results show that the circuit can harvest up to 3.5 mW with a 50 Ã— 31.8 mm² piezoelectric cantilever under 0.5 g (rms) base acceleration. Detailed loss analysis is presented for efficiency enhancement in the future.

Keywords

cantilevers; energy harvesting; low-power electronics; microcontrollers; piezoelectric devices; power convertors; power supply circuits; rectifying circuits; AC output; DC output; buck-boost converter; discontinuous conduction mode; full-wave rectifier; loss analysis; low power microcontroller unit; maximum power point tracking; output voltage regulation; piezoelectric cantilever; power 3.5 mW; self-powered power management circuit; source impedance; AC generators; Analog-digital conversion; Circuits; DC generators; Energy management; Impedance matching; Microcontrollers; Power generation; Rectifiers; Voltage control; Energy harvesting; Piezoelectric cantilever; Power management circuit;

fLanguage

English

Publisher

ieee

Conference_Titel

Applied Power Electronics Conference and Exposition (APEC), 2010 Twenty-Fifth Annual IEEE

Conference_Location

Palm Springs, CA

ISSN

1048-2334

Print_ISBN

978-1-4244-4782-4

Electronic_ISBN

1048-2334

Type

conf

DOI

10.1109/APEC.2010.5433535

Filename

5433535