System and method for inductive charging of portable devices
US11316371B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 21, 2021 |
| Grant date | Apr 26, 2022 |
| Priority date | — |
| Expiry date | Oct 21, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J2300/22
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A system for providing power inductively to a portable device. The system includes a primary coil, a drive circuit, a sense circuit, and a communication and control circuit. The communication and control circuit is configured to perform operations, including detection of communication and drive circuit operations. A portable device that includes a receiver unit coupled to a battery and configured to receive inductive power from an inductive charging system including a base unit with a primary coil and associated circuit The receiver unit includes a receiver coil, a ferromagnetic layer, and a receiver circuit. The receiver circuit includes a receiver communication and control circuit to modulate current in the receiver coil to communicate with a base unit while the receiver circuit is being powered by the inductive charging system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.