Synchronous rectification for contactless power supply utilizing Mn-Zn ferrite core coils

Hidekazu Miura, Shinsuke Arai, Fumihiro Sato, Hidetoshi Matsuki, Tadakuni Sato

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Contactless power supply systems transmit electric power by electromagnetic induction with a pair of coils. The efficiency and the output voltage depend on parameters of coils. We studied the best parameter values that realize stable high efficiency contactless power supply. In the application with low output voltage, the voltage drop of the diodes becomes dominant power loss. A synchronous rectification was proposed as a solution of this problem. Our contactless power supply system for an artificial heart operates at 190 kHz. We use planar coils with Mn-Zn ferrite cores. Highly stable output voltage and 88% maximum efficiency were realized.

Original languageEnglish
Article number10Q702
JournalJournal of Applied Physics
Volume97
Issue number10
DOIs
Publication statusPublished - 2005 May 15

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)
  • Physics and Astronomy(all)

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