{
  "$type": "site.standard.document",
  "description": "A detector (13) detects a value of a current or voltage generated by an auxiliary coil (L3). A detector (14) detects a value of a current flowing through a power transmitting coil (L1). A coupling coefficient estimator (15) estimates a first coupling coefficient (k12a) between the power…",
  "path": "/patents/1421009",
  "publishedAt": "2024-09-04T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60L53/12",
    "OMRON TATEISI ELECTRONICS CO [JP]"
  ],
  "textContent": "A detector (13) detects a value of a current or voltage generated by an auxiliary coil (L3). A detector (14) detects a value of a current flowing through a power transmitting coil (L1). A coupling coefficient estimator (15) estimates a first coupling coefficient (k12a) between the power transmitting coil (L1) and a power receiving coil (L2), based on the value of the current or voltage generated by the auxiliary coil (L3), and estimates a second coupling coefficient (k12b) between the power transmitting coil (L1) and the power receiving coil (L2), based on the value of the current flowing through the power transmitting coil (L1). A control circuit (16) controls a power supply circuit to stop power transmission to a power receiver apparatus (20) when a difference between the coupling coefficients is greater than a threshold.",
  "title": "CONTACTLESS POWER TRANSMISSION SYSTEM"
}