Apparatus and method for detecting foreign object in wireless power transmission system
US11437864B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 6, 2019 |
| Grant date | Sep 6, 2022 |
| Priority date | — |
| Expiry date | Aug 6, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J50/40
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Disclosed in the present specification is a wireless power reception device comprising: a power pickup unit for receiving wireless power from a wireless power transmission device by means of magnetic coupling with the wireless power transmission device and transforming, into a direct current signal, an alternating current signal generated by wireless power; a communication/control unit for receiving the direct current signal from the power pickup unit, transmitting, to the wireless power transmission device, a first power transmission suspension packet for temporarily suspending transmission of the wireless power in order to detect a foreign object, and performing a foreign object detection procedure within a predetermined time window when the transmission of the wireless power is temporarily suspended; and a load for receiving the direct current signal from the power pickup unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.