{
  "$type": "site.standard.document",
  "description": "Systems, methods and apparatus for wireless charging are disclosed. A wireless charging device has a plurality of planar power transmitting coils arranged in two or more layers between a charging surface and a ferrite layer, and a driver circuit configured to provide a charging current to one or…",
  "path": "/patents/1336870",
  "publishedAt": "2023-02-02T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "H02J50/402",
    "AIRA, INC."
  ],
  "textContent": "Systems, methods and apparatus for wireless charging are disclosed. A wireless charging device has a plurality of planar power transmitting coils arranged in two or more layers between a charging surface and a ferrite layer, and a driver circuit configured to provide a charging current to one or more of the plurality of planar power transmitting coils when a chargeable device is placed on or near the wireless charging device. Each planar power transmitting coil may be formed as a spiral winding surrounding a power transfer area. Inductance of each of the plurality of planar power transmitting coils measured at the charging surface varies from a nominal inductance value by less than ten percent.",
  "title": "LAMINAR COIL ARRAY IN A MULTI-DEVICE WIRELESS CHARGER"
}