Magnetic coupling device and wireless power transmission system using the same
US10650963B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 29, 2018 |
| Grant date | May 12, 2020 |
| Priority date | — |
| Expiry date | Nov 10, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J50/70
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Disclosed herein is a magnetic coupling device that includes first and second coil units that transmit power or signals with each other by wireless. Each of the first and second coil units includes a first coil and a second coil. At least one of the first and second coil units has a first magnetic body constituting a magnetic path of a first magnetic flux interlinking the first coil and a second magnetic body constituting a magnetic path of a second magnetic flux interlinking the second coil. A permeability of the first magnetic body is larger than a permeability of the second magnetic body at a driving frequency of the first coil and smaller than a permeability of the second magnetic body at a driving frequency of the second coil higher than the driving frequency of the first coil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.