A noncontact power-supply card powered by solar cells for mobile communication

Author

Kanai, Yausyuki ; Mino, Masato ; Sakai, Tatsuo

Author_Institution

NTT, Japan

fYear

2001

fDate

18-18 Oct. 2001

Firstpage

595

Lastpage

602

Abstract

This paper describes a new noncontact power-supply card powered by solar cells. The card supplies 300 mW to an electronic device without having to come into contact with the device. The size is 86 mm × 54 mm × 3.7 mm. To make the card thinner, we developed a new 0.7-mm-thick coil that uses amorphous magnetic ribbon. A new rechargeable battery boosts the output power. The transmission power is three times larger than that of the previous model. Power management circuits are added to reduce energy consumption. A battery charging circuit that has an excellent temperature profile was developed. We investigated various receiving circuits. One of those circuits, which uses an electrical double-layer capacitor (EDLC) and a voltage regulator, is described.

Keywords

coils; electromagnetic coupling; electromagnetic induction; mobile communication; power transmission; solar cells; telecommunication power supplies; 0.7 mm; 3.7 mm; 300 mW; 54 mm; amorphous magnetic ribbon; battery charging circuit; coil; electrical double-layer capacitor; electronic device; energy consumption reduction; noncontact power-supply card; output power boosting; power management circuits; receiving circuits; rechargeable battery; solar cells; temperature profile; voltage regulator;

fLanguage

English

Publisher

iet

Conference_Titel

Telecommunications Energy Conference, 2001. INTELEC 2001. Twenty-Third International

Conference_Location

Edinburgh, UK

ISSN

0537-9989

Print_ISBN

0-85296-744-6

Type

conf

DOI

10.1049/cp:20010657

Filename

988624