Wireless power feeding system
US10622141B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 20, 2017 |
| Grant date | Apr 14, 2020 |
| Priority date | — |
| Expiry date | Jan 4, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B5/79
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A wireless power feeding system includes a power transmission device and a power reception device. A power transmission circuit in the power transmission device switches high-frequency power supplied to a power transmission coil. When a reset IC in the power reception device detects switching of high-frequency power by the power transmission circuit, the power reception device changes an input impedance seen from the power transmission circuit to the side where a load circuit is disposed on the basis of the content of a signal to be transmitted to the power transmission device. The power transmission device detects the change in the input impedance and obtains the content of the signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.