Wireless power transfer system for docent robot by using magnetic resonant coils

Author

In-Kui Cho ; Seong-Min Kim ; Jeong-Ik Moon ; Jae-Hun Yoon ; Soon-Ik Jeon ; Jae-ick Choi

Author_Institution

Radio & Broadcasting Res. Div., ETRI, Daejeon, South Korea

fYear

2013

fDate

29-31 Oct. 2013

Firstpage

251

Lastpage

254

Abstract

A wireless power transmission system for 1.78MHz, 60W docent robot using coupled magnetic resonances is presented. The proposed wireless power transmission system consists of a 130W class-F power transmitter, two magnetic resonance couplers and 60W full bridge RF rectifier receiver. The transmitter is composed of DDS (Direct Digital Synthesizer) block, class-F power amplifier and VSWR measurement block to implement the frequency searching and power tracking function. Two magnetic resonance couplers are designed with a small spiral resonator. The diameter size of the spiral coil is 30 cm (1.8λ/1000). The receiver is composed of RF rectifier, overvoltage protection (OVP) with active dummy load and DC to DC converter. The charging power of the docent robot is about 48W and the entire DC to DC system efficiency of this WPT system is 54%.

Keywords

UHF couplers; UHF resonators; coils; magnetic resonance; microwave power transmission; mobile robots; DC to DC converter; DDS; OVP; RF rectifier; VSWR measurement block; WPT system; active dummy load; class-F power amplifier; class-F power transmitter; direct digital synthesizer block; docent robot; efficiency 54 percent; frequency 1.78 MHz; frequency searching function; full bridge RF rectifier receiver; magnetic resonance couplers; magnetic resonant coils; overvoltage protection; power 130 W; power 60 W; power tracking function; size 30 cm; spiral resonator; wireless power transfer system; wireless power transmission system; Coils; Frequency measurement; Magnetic resonance; Power transmission; Receivers; Wireless communication; Frequency separation; Magnetic resonance; Power transmitter; RF rectifier; Wireless power transmission;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave, Antenna, Propagation and EMC Technologies for Wireless Communications (MAPE), 2013 IEEE 5th International Symposium on

Conference_Location

Chengdu

Print_ISBN

978-1-4673-6077-7

Type

conf

DOI

10.1109/MAPE.2013.6689879

Filename

6689879