Method for detecting foreign material, and apparatus and system therefor
US11086042B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 18, 2017 |
| Grant date | Aug 10, 2021 |
| Priority date | — |
| Expiry date | Dec 11, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J50/80
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention relates to a method and an apparatus for detecting foreign material for wireless charging, and according to one embodiment of the present invention, a method by which a wireless power transmitter detects foreign material comprises the steps of: measuring the strength of a current inputted into an inverter in a ping step; receiving a packet including a receiver type identifier; determining a threshold value for detecting the foreign material corresponding to the receiver type identifier; and comparing the measured strength of current with the threshold value so as to determine whether the foreign material is present.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.