Wireless power transmission system for free-position wireless charging of multiple devices
US9711278B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 17, 2013 |
| Grant date | Jul 18, 2017 |
| Priority date | — |
| Expiry date | Oct 17, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F2027/2809
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a near-field wireless power transfer system capable of having a constant efficiency regardless of a charging position of a receiver by only using a simple impedance matching circuit without using a separate existing complex adaptive impedance matching circuit or control circuit, and simultaneously transmitting power without having difficulty with impedance matching even for wireless power transmission to a plurality of electronic devices by applying a wireless power transmitter with a transmitting coil having a structure to generate a uniform mutual inductance between the transmitting coil of the wireless power transmitter and a receiver coil of each of the plurality of electronic devices.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.