Multi-tapped coil for wireless charging range and efficiency
US10523035B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 11, 2016 |
| Grant date | Dec 31, 2019 |
| Priority date | — |
| Expiry date | Oct 17, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J50/80
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method, a portable electronic device and a wireless charging system enables a load to be charged by selectively using a detection circuit configuration and a power receiving circuit configuration. A controller is coupled within a wireless power receiver (i) to a sensing circuit having a multi-tapped coil and (ii) to a rectifier that is coupled to the sensing circuit and removably coupled to a load. The controller detects, at an output of the rectifier, a first signal corresponding to an externally transmitted signal that is magnetically coupled to the multi-tapped coil while the sensing circuit is in the detection circuit configuration. In response to detecting the first signal, the controller switches from the detection circuit configuration to the power receiving circuit configuration. The controller then connects the load to the output of the rectifier in order to deliver power to the load.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.