Magnetic shield for primary coil of transcutaneous energy transfer device

A transcutaneous energy transfer device comprising:

• an external primary coil to which energy to be transferred is applied;
• an implanted secondary coil configured to be inductively coupled to said primary coil and connected to apply energy to a subcutaneous utilization device;
• and
• a magnetic shield adjacent a side of said primary winding opposite said secondary coil,
• wherein said shield is flexible so as to be able to conform to the contours of a patient's body.

A transcutaneous energy transfer device comprising:

• an external primary coil to which energy to be transferred is applied;
• an implanted secondary coil configured to be inductively coupled to said primary coil and connected to apply energy to a subcutaneous utilization device;
• and a magnetic shield covering a side of said primary winding opposite said secondary coil,
• wherein said shield is a flexible shield formed of a low loss magnetic material in a flexible polymer matrix.

A transcutaneous energy transfer device comprising:

• an external primary coil to which energy to be transferred is applied;
• an implanted secondary coil configured to be inductively coupled to said primary coil and connected to apply energy to a subcutaneous utilization device;
• and
• a flexible, conforming magnetic shield covering a side of said primary winding opposite said secondary coil, wherein said shield is formed of a plurality of individual segments connected by a porous, flexible material.