Method and apparatus for periodically changing frequency in wireless power transfer
US9843226B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 6, 2012 |
| Grant date | Dec 12, 2017 |
| Priority date | — |
| Expiry date | Nov 4, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F1/26
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Disclosed are a wireless power transfer apparatus, and a method of changing a frequency in the wireless power transfer apparatus, in which the magnetic field intensity in a specific frequency band is decreased by periodically changing the frequency of a wireless power signal, so that it is possible to spread a frequency spectrum. To this end, a wireless power transfer apparatus includes a power transmission unit and a control unit. The power transmission unit generates a wireless power signal for transferring wireless power based on a carrier signal. The control unit determines a sweep frequency range and sweep period for the carrier signal and controls the power transmission unit to periodically change the frequency of the wireless power signal by periodically changing the frequency of the carrier signal based on the determined sweep frequency range and sweep period.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.