Magnetic structures for large air gap

摘要

The magnetic component structures of this invention provides an improved magnetic core and winding arrangement which increases the inductive coupling between the primary and the secondary part compared to a similar single cell structure. A new and innovating wireless power transfer magnetic structure is provided that increases the efficiency of the wireless power transfer by means of increased inductive coupling. Another advantage of these structures is low susceptibility to misalignment errors. The invention comprises two or more identically structural units named cells. The magnetic structure is made of magnetically permeable material and consists of two identical parts, the primary side and the secondary side, that are separated by a large air gap or any other electrically or magnetically nonconductive material. The two identical parts compose the wireless transformer. The transformer includes also copper wire winded around specific areas of the magnetic structure. The versions of the invention presented increase the inductive coupling of the wireless transformer. As a result, the wireless power is transferred more efficient.