FOD and wireless power transfer calibration
US11515739B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 14, 2021 |
| Grant date | Nov 29, 2022 |
| Priority date | — |
| Expiry date | Feb 14, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L1/1657
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In an embodiment, a method includes: wirelessly transmitting power using a transmitter LC tank to a wireless power receiver having a receiver LC tank; receiving a first received power packet from the wireless power receiver, the first received power packet including a received power value field indicative of a power level; determining a first power difference between transmitted power and received power based on the first received power packet; calculating a first received power compensation factor based on the first power difference; interrupting wirelessly transmitting power for a first slot period after receiving the first received power packet; performing a first measurement of a first signal associated with the transmitter LC tank during the first slot period; determining a first Q factor value based on the first measurement; comparing the first Q factor value with a reference Q factor value; and detecting a metallic object based on the comparison.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.