ENERGY TRANSFERRING SYSTEM FOR TOTALLY IMPLANTABLE MEDICAL DEVICES USING AMORPHOUS MAGNETIC FIBERS

The transmitting capacity and temperature rise of transcutaneous energ y transmitting coils incorporating amorphous magnetic fibers are discu ssed. A magnetic core with a long, narrow shape (rather than a pot-cor e) is preferred for implantation inside the body. For the energy trans mitting coils, the reduction in temperature rise is the most important problem. Copper loss is a dominant factor in the reduction of the tem perature rise. When the diameter of the coils is halved, the copper lo ss increases fourfold and the temperature rise increases tenfold.