Systems and methods for induction charging with a closed magnetic loop
US9899878B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 21, 2015 |
| Grant date | Feb 20, 2018 |
| Priority date | — |
| Expiry date | May 19, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J50/70
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In one aspect, an apparatus for wireless power transmission comprises a plurality of coils and a controller. The controller is configured to sequentially energize each coil of the plurality of coils to produce a magnetic field. The controller is configured to select a subset of the plurality of coils based on a measure of coupling between each coil of the subset of the plurality of coils and at least one receiver coil of a chargeable device. The controller is configured to sequentially energize pairs of coils selected from the subset of the plurality of coils. The controller is configured to select at least two coils from the subset of the plurality of coils for wireless power transmission based on a measure of coupling between each of the pairs of coils and the at least one receiver coil of the chargeable device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.