Inductive battery charger system with primary transformer windings formed in a multi-layer structure
First Claim
1. A battery charging system comprising a charging module comprising a primary charging circuit and being formed with a planar charging surface adapted to receive an electronic device to be charged, wherein said primary charging circuit includes a plurality of transformer windings formed in a multi-layer structure comprising at least two layers, each of said layers comprising a regular array of primary windings, each said primary winding being substantially parallel to said planar charging surface, the array of a first layer of said layers being offset relative to the array of a second layer of said layers, wherein said primary windings are provided with electromagnetic shielding on the side of said multi-layer structure opposite from said planar charging surface, and wherein said electronic device is formed with a secondary winding.
3 Assignments
0 Petitions
Accused Products
Abstract
There is provided a planar inductive battery charging system designed to enable electronic devices to be recharged. The system includes a planar charging module having a charging surface on which a device to be recharged is placed. Within the charging module and parallel to the charging surface is at least one and preferably an array of primary windings that couple energy inductively to a secondary winding formed in the device to be recharged. The invention also provides secondary modules that allow the system to be used with conventional electronic devices not formed with secondary windings.
-
Citations
29 Claims
- 1. A battery charging system comprising a charging module comprising a primary charging circuit and being formed with a planar charging surface adapted to receive an electronic device to be charged, wherein said primary charging circuit includes a plurality of transformer windings formed in a multi-layer structure comprising at least two layers, each of said layers comprising a regular array of primary windings, each said primary winding being substantially parallel to said planar charging surface, the array of a first layer of said layers being offset relative to the array of a second layer of said layers, wherein said primary windings are provided with electromagnetic shielding on the side of said multi-layer structure opposite from said planar charging surface, and wherein said electronic device is formed with a secondary winding.
- 15. A charging module for a battery charging system, said module comprising a primary charging circuit and being formed with a charging surface for receiving an electronic device to be charged, wherein said charging module comprises a plurality of transformer primary windings formed in a multi-layer structure comprising at least two layers, each of said layers comprising a regular array of primary windings, the array of a first layer of said layers being offset relative to the array of a second layer of said layers.
Specification