System and method for inductive charging of portable devices
US11342792B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 21, 2021 |
| Grant date | May 24, 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
An electronic device having an inductive power transfer system is disclosed. The electronic device includes an inductive coil for inductive power transfer using an alternating magnetic field and a permanent magnet for creating a separable magnetic attachment between the electronic device and a second device having an inductive coil. The permanent magnet is positioned substantially at the geometric center of the inductive coil to align the inductive coil with the inductive coil in the second device. The permanent magnet has substantially flat first and second surfaces substantially parallel to the inductive coil, and the permanent magnet is manufactured to have an electrical resistivity to impede eddy current generation in the permanent magnet and heating of the permanent magnet by the alternating magnetic field during inductive power transfer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.