Energy transferring system for totally implantable medical devices using amorphous magnetic fibers

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