JP2005525705A5 - - Google Patents

Claims (20)

A primary unit for use in a power transfer system having a power transfer surface, wherein the secondary device separable from the primary unit requires direct electrical conductive contact between the primary unit and the secondary device. The power transfer surface is formed and arranged to be placed in the power transfer area of the surface or in a work area close to the power transfer area to receive power from the primary unit,
Electromagnetic field generating means comprising a plurality of conductive elements disposed at or below the power transmission surface and substantially parallel to the power transmission surface, wherein the elements are distributed over the power transmission area. The conductive elements extend parallel to each other in the generating region, and the conductive element has a sufficient distance in the working region for the secondary device to overlap two or more conductive elements, A primary unit in which each instantaneous current instantaneously flowing through all the conductive elements in the region is in the same direction.   The primary unit according to claim 1, wherein the conductive elements in the generation region are arranged substantially in a straight line.   The primary unit according to claim 1, wherein the conductive elements in the generation region are arranged apart from each other.   The primary unit according to any one of claims 1 to 3, wherein electromagnetic field lines of the electromagnetic field are substantially parallel to each other at any moment in the power transmission region.   The primary unit according to any one of claims 1 to 4, wherein electromagnetic field lines of the electromagnetic field are parallel to the power transmission surface at least in a central portion of the power transmission region.   The power transmission area where a secondary device that receives power cannot be arranged is not substantially discontinuous from one side of the area to the other in two dimensions. Primary unit described in the section.   The primary unit according to claim 1, further comprising a magnetic core on which the conductive element extends.   The primary unit according to claim 1, wherein the two or more conductive elements are different parts of the same coil.   The primary unit of claim 8, wherein the coil is wound around a magnetic core.   The primary unit according to claim 1, wherein the plurality of conductive elements are conductive tracks formed in a plane.   A first plurality of conductive elements and a second plurality of conductive elements, wherein the first conductive element extends a generating region in a first direction, and the second conductive element includes a first generating region; 11. A primary unit as claimed in any one of the preceding claims, extending in a second direction that is substantially perpendicular to the direction.   The primary unit according to claim 11, further comprising driving means for alternately driving the first conductive element and the second conductive element.   The primary unit according to claim 11, further comprising driving means for driving the first conductive element and the second conductive element orthogonally.   14. A primary unit according to any one of claims 1 to 13, wherein the power transfer surface is substantially planar.   The primary unit of any one of claims 1 to 13, wherein the power transfer surface is substantially curved. A system for transmitting power without the need for direct electrical contact,
A power transfer surface configured and arranged to be placed in a power transfer area on the surface where the secondary device receives power or in a work area close to the power transfer area;
A plurality of conductive elements disposed at or below the power transmission surface and substantially parallel to the power transmission surface, the elements for generating an electromagnetic field distributed over the power transmission area; Extending parallel to each other in the generation region, the conductive elements having a sufficient distance in the working region for the secondary device to overlap two or more conductive elements, A primary unit including an electromagnetic field generator in which each instantaneous current that flows instantaneously in the active element is in the same direction;
A secondary unit that is separable from the primary unit and includes at least one electrical conductivity that couples an electromagnetic field generated by the electromagnetic field generator and induces a current to flow through the electrical conductivity when a secondary device is placed in the work area. The next device,
A system comprising:   The secondary device is carried in or by an object that requires power, and the carried secondary device has the work area so that the object is at or near the power transmission surface. The system of claim 16, wherein the system is capable of receiving power from the primary unit when deployed in the system.   The system of claim 16, wherein the secondary device is carried in or by a rechargeable battery or cell that adapts or adapts to an object that requires power.   The battery or cell is adapted to the object, and the object is disposed at or near the power transmission surface, whereby the secondary device has the work area, and the battery or cell is the The system of claim 18, wherein recharging is possible without leaving the object.   The system of claim 17, wherein the object is a portable electrical device or an electronic device.