Wireless charging system with inductance imaging
US10326316B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 6, 2017 |
| Grant date | Jun 18, 2019 |
| Priority date | — |
| Expiry date | Feb 8, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J50/80
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A wireless power transmission system has a wireless power receiving device that is located on a charging surface. The wireless power transmitting device has an array of wireless power transmitting coils that overlap the charging surface. The wireless power transmitting device uses inductance measurement circuitry that is coupled to the coil array to measure coil inductances for the wireless power transmitting coils. The wireless power receiving device may contain a communications integrated circuit, display circuitry, or other sensitive components. The location and orientation of the wireless receiving device on the charging surface can be determined by analyzing the coil inductances. This information and information on the location of the sensitive component within the wireless power receiving device can be used to select a wireless power transmitting coil to transmit wireless power signals to the wireless power receiving device without exposing the sensitive component to excessive wireless power signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.