Electronic device having an inductive receiver coil with ultra-thin shielding layer and method
US9084343B2 · kind B2 · utility
18Cited by
10References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 5, 2010 |
| Grant date | Jul 14, 2015 |
| Priority date | — |
| Expiry date | May 5, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J7/0042
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electronic device (10,40) which is inductively powered or charged has a receiver coil (12) on which a metal object (24,42) can be placed without causing deterioration of the coil's magnetic field and without generating heat in the metal object. An ultra-thin, flexible, high magnetic permeability metal foil (14) having a thickness of 50 μm or less is provided as a shielding layer between the coil and the object. Radial slits (22) are provided in the shielding layer, which suppress unwanted eddy currents in the layer to reduce power transfer losses and heat generation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.