抄録
In order to achieve a longer service life of an implantable cardiac pacemaker, a secondary (rechargeable) battery system and a charging system to charge a secondary battery transcutaneously from outside of a living body have been studied at our laboratories. Some basical findings about a relationship between a transformer gap and its coupling ratio and other items were obtaind. A transformer small enough to put in a current cardiac pacemaker was experimenally made and tested regarding effects of the gap and a relative horizontal position change of the primary and secondary coils on transmission efficincy.
