Wireless power transmitter and method of error detection during use thereof
US10361566B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 1, 2015 |
| Grant date | Jul 23, 2019 |
| Priority date | — |
| Expiry date | Jul 17, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B5/79
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A wireless power transmitter is provided for power transmission to a wireless power receiver. The transmitter comprises a primary coil to transfer power to a secondary coil of the wireless power receiver, a power supply, a driver to provide an electric potential from the power supply to the primary coil, a monitoring system to measure electrical flow parameters of the primary coil, and to filter the measured electrical flow parameters thereby producing a response signal, and a controller to direct operation of the wireless power transmitter. The controller is configured to perform error checking by directing the driver to provide the electric potential as a superposition of a transmission signal and a sensing signal, the filter characteristics comprising electrical flow parameters of the and sensing signal, and detecting, based a difference between the response and sensing signals, an error condition indicative of a foreign object.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.