{
  "$type": "site.standard.document",
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  "description": "A wireless power transmission apparatus includes: first coils (222A-222C) receiving electric power from an AC power supply for transmitting the electric power to a power reception apparatus; and a controller (242) selecting, from the first coils, a coil to be used for transmission of electric power…",
  "path": "/patents/973340",
  "publishedAt": "2014-06-25T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60L53/126",
    "TOYOTA MOTOR CO LTD [JP]"
  ],
  "textContent": "A wireless power transmission apparatus includes: first coils (222A-222C) receiving electric power from an AC power supply for transmitting the electric power to a power reception apparatus; and a controller (242) selecting, from the first coils, a coil to be used for transmission of electric power to the power reception apparatus, based on a position of the power reception apparatus. The first coils are each configured to be switchable between a first state in which electric power can be transmitted to the power reception apparatus and a second state in which efficiency in transmission of electric power to the power reception apparatus is lower than the first state. The controller sets a coil in the first state that is selected to be used for transmission of electric power, and sets a coil in the second state that is not to be used for transmission of electric power",
  "title": "CONTACTLESS POWER TRANSMISSION DEVICE, CONTACTLESS POWER RECEIVING DEVICE AND CONTACTLESS POWER TRANSCEIVER SYSTEM"
}