Wireless charging coil placement for reduced field exposure
US10516304B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 22, 2015 |
| Grant date | Dec 24, 2019 |
| Priority date | — |
| Expiry date | Dec 6, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J50/70
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An apparatus is described herein. The apparatus includes a power transmit unit coil and an active shielding coil. The power transmit unit coil includes a set of main windings, positioned at a first location on a structure, to carry a first current in a first direction, wherein the first current is to cause an electromagnetic field to emanate from the power transmit unit coil. The active shielding coil is positioned at a second location on the structure and is to carry a second current in a direction substantially opposite the first direction wherein the second current is to cause a reduction of the size of the electromagnetic field.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.