{
  "$type": "site.standard.document",
  "coverImage": {
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  "description": "A contactless power transfer core used for a power transmission coil or a power reception coil of a contactless power transfer apparatus includes: a winding core part (81) wound by an electric wire; and a magnetic pole core part (80) constituting a magnetic pole portion provided at both sides of…",
  "path": "/patents/923711",
  "publishedAt": "2017-07-26T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60L53/12",
    "TECHNOVA INC [JP]"
  ],
  "textContent": "A contactless power transfer core used for a power transmission coil or a power reception coil of a contactless power transfer apparatus includes: a winding core part (81) wound by an electric wire; and a magnetic pole core part (80) constituting a magnetic pole portion provided at both sides of the winding core part. A height of the uppermost part of a ferrite plate (80) arranged on a face of the magnetic pole core part at a side opposing a counterpart coil is equal to or greater than a height of an outer circumference of the electric wire (50) wound around the winding core part (81), and a height of the ferrite plate of a face at a side not opposing the counterpart coil is lower than the height of the outer circumference of the electric wire (50) wound around the winding core part (81). A magnetic gap length D2 can be reduced while maintaining the mechanical gap length D1, thereby the inter-coil coupling factor is improved, and the power feed efficiency and the maximum feed power are increased.",
  "title": "CONTACTLESS POWER TRANSFER APPARATUS"
}