Wireless power receiver, control method thereof, power receiving control circuit, and electronic apparatus
US10547212B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 6, 2017 |
| Grant date | Jan 28, 2020 |
| Priority date | — |
| Expiry date | Mar 24, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B5/79
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A wireless power receiver that receives a power signal from a wireless power transmitter includes: a receiving antenna including a receiving coil for receiving the power signal; a rectifying circuit configured to rectify an alternating current flowing through the receiving antenna; a smoothing capacitor configured to smooth an output of the rectifying circuit; an overvoltage detecting circuit configured to compare a rectified voltage generated in the smoothing capacitor with an overvoltage threshold; a modulator configured to change a parallel resonance frequency of the receiving antenna; and a discharging circuit configured to be switched between an enable state and a disable state and configured to enter the enable state during a communication period by the modulator to discharge the smoothing capacitor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.