AC-DC converter for wireless power transmission of energy harvesting system

Author

Tae-il Yun ; Jang Hyun Lee ; Jong Jin Baek ; Youn Tae Kim

Author_Institution

IT Fusion Technol. Res. Center, Chosun Univ., Gwangju, South Korea

fYear

2014

fDate

22-25 June 2014

Firstpage

1

Lastpage

2

Abstract

In this study, a high-efficiency AC-DC converter is developed for a wireless power transmission system that transmits power generated from energy harvesting. RF power is transmitted in the frequency of 10-100 MHz, and power of -10 to 15 dBm is received by the AC-DC converter. A matching network is designed according to the received power from resonant coils, and the load resistor is optimized to obtain maximum output power. As a result, conversion efficiency ranging from 50% to a maximum of 87% is achieved in an RF power range of -10 to 15 dBm that has 10-100 MHz frequency. Compared to other converters, the implemented AC-DC converter shows not only 20%-40% higher peak efficiency, but also 20%-50% higher average efficiency. It is suitable for application in wearable devices or body area networks.

Keywords

AC-DC power convertors; energy harvesting; radiofrequency power transmission; RF power; average efficiency; body area networks; conversion efficiency; efficiency 50 percent to 87 percent; energy harvesting system; frequency 10 MHz to 100 MHz; high-efficiency AC-DC converter; implemented AC-DC converter; load resistor optimization; matching network; maximum output power; peak efficiency; resonant coils; wearable devices; wireless power transmission system; Coils; Energy harvesting; Frequency conversion; Power measurement; Power transmission; Radio frequency; Wireless communication; AC-DC converter; Schottky diode; wireless power transmission;

fLanguage

English

Publisher

ieee

Conference_Titel

Consumer Electronics (ISCE 2014), The 18th IEEE International Symposium on

Conference_Location

JeJu Island

Type

conf

DOI

10.1109/ISCE.2014.6884370

Filename

6884370