System and method for wireless charging foreign object detection
US12418201B2 · kind B2 · utility
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Key dates
| Filing date | Oct 14, 2023 |
| Grant date | Sep 16, 2025 |
| Priority date | — |
| Expiry date | Oct 14, 2043 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T90/14
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A misalignment tolerant foreign object detection approach is proposed for use with wireless charger systems where sensor coils or portions thereof are mirrored about one or more axes of radial symmetry. A first variant is proposed adapted for x-axis misalignment tolerance, and a second variant is proposed for simultaneous x and y axis misalignment tolerance. Further variants are proposed with additional rotational misalignment tolerance. Detection of the foreign object despite misalignment in receiver and transmitter coils is an important safety and efficiency consideration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.