Wireless power transfer object detection circuit and method
US11881719B2 · kind B2 · utility
0Cited by
19References
46Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 14, 2020 |
| Grant date | Jan 23, 2024 |
| Priority date | — |
| Expiry date | Jan 15, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/33584
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In an embodiment, a method includes: wirelessly transmitting power using a transmitter LC tank; wirelessly receiving power from the transmitter LC tank using a receiver LC tank; interrupting wirelessly transmitting power for a slot period; during the slot period, shorting the receiver LC tank; during the slot period and after shorting the receiver LC tank, measuring a transmitter signal associated with the transmitter LC tank; determining a power loss associated with the wirelessly transmitting power based on the measured transmitter signal; and detecting a metallic object based on the determined power loss.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.