Contactless power transmission apparatus and contactless power transmission method

A contactless power transmission system for transmitting electric power from a power feeding coil to a power receiving coil without their mutual contact and using electromagnetic induction, wherein:

• said power feeding coil is made up of a plurality of power coils disposed adjoining one another on a primary side, a said plurality of adjoining power coils on the primary side generating magnetic fluxes varied in orientation from one another,
• said power receiving coil is made up of a plurality of power coils disposed adjoining one another on a secondary side, a said plurality of adjoining power coils on the secondary side generating magnetic fluxes varied in orientation from one another, and
• said adjoining power coils on each of said primary and secondary sides are positioned and laid one on another to coincide in part so that a noise from a leakage electromagnetic field being generated during power transmission, an external noise and a noise that said power feeding and receiving coils themselves are emitting outwards are thereby canceled out.

A contactless power transmission method using a near electromagnetic field, comprising:

• preparing a power feeding coil made up of a plurality of power coils disposed adjoining one another on a primary side and a power receiving coil made up of a plurality of power coils disposed adjoining one another on a secondary side;
• and
• configuring a said plurality of adjoining power coils on each of the primary and secondary sides by positioning and laying them one on another to coincide in part so that a noise from a leakage electromagnetic field being generated during power transmission, an external noise and a noise that said power feeding and receiving coils themselves are emitting outwards are thereby canceled out.

A contactless power transmission method using a near electromagnetic field for transmitting electric power from a power feeding coil to a power receiving coil without their mutual contact and using electromagnetic induction, comprising:

• making up said power feeding coil of a plurality of power coils disposed adjoining one another on a primary side, a said plurality of adjoining power coils on the primary side generating magnetic fluxes varied in orientation from one another, and making up said power receiving coil of a plurality of power coils disposed adjoining one another on a secondary side, a said plurality of adjoining power coils on the secondary side generating magnetic fluxes varied in orientation from one another;
• and
• configuring a said plurality of power coils on each of the primary and secondary sides by positioning and laying them one on another to coincide in part so that a noise from a leakage electromagnetic field being generated during power transmission, an external noise and a noise that said power feeding and receiving coils themselves are emitting outwards are thereby canceled out.