Coil unit and apparatus for detecting foreign matter
US9829454B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 26, 2014 |
| Grant date | Nov 28, 2017 |
| Priority date | — |
| Expiry date | Jul 1, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V3/105
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention aims to provide a coil unit for improving an accuracy in detecting foreign matter and an apparatus for detecting foreign matter which improves the accuracy in detecting foreign matter when a power is transmitted in a contactless manner. A power feeding coil unit (a coil unit) of the present invention is provided with a power feeding coil (a coil for power transmission) and an apparatus for detecting foreign matter. The apparatus for detecting foreign matter is provided with a plurality of resonators having a resonator coil and a resonator capacitor and also an excitation coil for exciting the plurality of resonators. The plurality of resonators are disposed to cover at least an area interlinking with a magnetic flux generated by the power feeding coil and to decrease an influence of mutual inductance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.