Wireless inductive power transfer
US10734843B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 21, 2017 |
| Grant date | Aug 4, 2020 |
| Priority date | — |
| Expiry date | Dec 21, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B5/263
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A wireless power transfer system includes a power transmitter configured to provide a power transfer to a power receiver via a power transfer signal. The power receiver includes a first mode controller configured to transmit a standby mode exit request to the power transmitter by changing a loading of a communication inductor of the power transmitter. The power transmitter includes a mode controller configured to control the power transmitter to operate in a standby mode where a presence of the power receiver is detected but no power transfer signal is generated. A detector is configured to detect an impedance change of the communication inductor. The mode controller is configured to initiate a transition from the standby mode to a power transfer mode in response to the detector detecting the impedance change.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.