A direct AC-DC and DC-DC cross-source energy harvesting circuit with analog iterating-based MPPT technique with 72.5% conversion efficiency and 94.6% tracking efficiency

Author

Tzu-Chi Huang ; Ming-Jhe Du ; Kuei-Liang Lin ; Shao Siang Ng ; Ke-Horng Chen ; Chin-Long Wey ; Ying-Hsin Lin ; Tsung-Yen Tsai ; Chen-Chih Huang ; Chao-Cheng Lee ; Jui-Lung Chen ; Hung-Wei Chen

Author_Institution

Nat. Chiao Tung Univ., Hsinchu, Taiwan

fYear

2014

fDate

10-13 June 2014

Firstpage

1

Lastpage

2

Abstract

The proposed cross-source energy (CSE) harvesting circuit can accept universal energy sources, including AC and DC sources. The buck-boost conversion of CSE harvesting circuit automatically converts AC or DC input into DC output without being limited by universal input voltage range. CSE harvesting circuit provides dual outputs, a regulated output and a battery charging output, to optimally arrange harvest energy with 72.5% of power efficiency. A backup converter is designed to cooperate with CSE harvesting circuit to guarantee voltage stability of the regulated output. The proposed analog iterating-based (AIB) maximum power point tracking (MPPT) technique achieves 94.6% tracking efficiency without complex data calculation and storage compared to previous techniques.

Keywords

AC-DC power convertors; energy harvesting; maximum power point trackers; AC sources; AIB; CSE energy harvesting circuit; DC sources; DC-DC cross-source energy harvesting circuit; analog iterating-based MPPT technique; backup converter; battery charging output; conversion efficiency; direct AC-DC energy harvesting circuit; dual outputs; efficiency 72.5 percent; efficiency 94.6 percent; maximum power point tracking technique; regulated output; tracking efficiency; universal energy sources; universal input voltage range; voltage stability; Batteries; Current measurement; Market research; Maximum power point trackers; Pulse width modulation; Timing; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

VLSI Circuits Digest of Technical Papers, 2014 Symposium on

Conference_Location

Honolulu, HI

Print_ISBN

978-1-4799-3327-3

Type

conf

DOI

10.1109/VLSIC.2014.6858365

Filename

6858365