WIRELESS POWER TRANSFER APPARATUS HAVING MAGNETIC FIELD SHIELDING FUNCTION

摘要

PURPOSE: A wireless power transmission apparatus which is equipped with the electromagnetic field shield of the current transformer is provided to arrange a separate transformer in one end of a concentrator coil, thereby blocking the leakage of the magnetic field. CONSTITUTION: An electric supply coil (3) is laid under the road or is installed at the bottom surface of a fixed place. A concentrator coil (2) is arranged in parallel to the electric supply coil. The concentrator coil receives the electricity by the magnetic induction. A magnetic field offset coil (8) forms the magnetic field of the backward direction in the outside of the concentrator coil. The magnetic field offset coil offsets the magnetic field of the outside of the concentrator coil.