Wireless power transmitter
US10727684B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 7, 2017 |
| Grant date | Jul 28, 2020 |
| Priority date | — |
| Expiry date | Oct 27, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B5/79
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A wireless power transmitter includes a converter, a resonator, and a controller. The converter includes switching elements forming a bridge circuit, and is configured to output an alternating current (AC) voltage in response to control signals. The resonator includes a resonant capacitor and a resonant coil, and is configured to receive the AC voltage to wirelessly transmit power. The controller is configured to perform a first mode operation in which a duty of the control signals is fixed, a frequency of one of the control signals is varied and the control signals are output, and a second mode operation in which a frequency of the control signals is fixed, a duty of one of the control signals is reduced and the control signals are output.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.