Foreign object detection apparatus and method for wireless charging system, and wireless charging system
US11329521B2 · kind B2 · utility
3Cited by
1References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 23, 2021 |
| Grant date | May 10, 2022 |
| Priority date | — |
| Expiry date | Mar 23, 2041 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T90/14
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
This application provides a wireless charging foreign object detection apparatus, applied to the field of wireless charging technologies. The detection apparatus includes: an excitation coil configured to provide a time-varying magnetic field, detection coils configured to detect a foreign object, and a processor configured to determine whether a foreign object exists. The detection coils may include two detection coils, or may include at least three detection coils. The at least three detection coils may be further configured to eliminate a detection blind spot.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.