Power transmission of a desk with a cord-free power supply

Koichi Hatanaka, Fumihiro Sato, Hidetoshi Matsuki, Shinki Kikuchi, Jun Ichi Murakami, Makoto Kawase, Tadakuni Satoh

Research output: Contribution to journalConference articlepeer-review

65 Citations (Scopus)


The battery is an indispensable component of portable electronic equipment, but charging is often inconvenient. A contactless electric power supply, such as the desk-type contactless power station (CLPS) we propose, significantly improves the ease of charging such equipment. In this system, primary coils are embedded into the desk surface to efficiently supply electrical power to portable equipment placed on the desk. Only the primary and the secondary coils facing each other work as a power transmitter. We have confirmed that electric power transmission with efficiency of 85±5 % can be attained anywhere on the desk. This examination reveals the effectiveness of using several primary coils.

Original languageEnglish
Pages (from-to)3329-3331
Number of pages3
JournalIEEE Transactions on Magnetics
Issue number5 I
Publication statusPublished - 2002 Sept
Event2002 International Magnetics Conference (Intermag 2002) - Amsterdam, Netherlands
Duration: 2002 Apr 282002 May 2


  • Contactless
  • Electric supply
  • Portable electric equipment
  • Selective excitation


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